Community Events - county District 07
Explore government and community events specific to your district from our Firestore database. Stay informed about local meetings, civic events and community participation opportunities.
Community Events
M Factor 2 "Before the Pause" Screening and Panel Discussion
Date: 2026-02-05T17:00:00-08:00
Description: Swan Medical invites the community to a free screening of The M Factor 2: Before the Pause, an informative film focused on perimenopause and menopause. Following the film, Dr. Peter Castillo, Founder and Medical Director of Swan Medical, will participate in a live Q&A, moderated by Jen Marples of The Jen Marples Show. Open to the public. Join us for an evening of education, conversation, and empowerment.
Location: Cinemark Century Walnut Creek 14 and XD
Source: Walnut Creek Chamber of Commerce
More informationUnleash the LOVE: Festival & Adopt-a-thon
Date: 2026-02-07T10:00:00
Description: Joybound hosts Tails on the Trail - Fun Run and Walk Register here: https://joybound.org/event/unleash-the-love-2026/ Let’s Unleash the LOVE! You’re officially invited to join us on Saturday, February 7 for Joybound’s third-annual Unleash the LOVE event at our Walnut Creek headquarters! We’re going all out, with 2026’s festivities being bigger than ever before! The Fun Run & Walk at 10:00 am For the first time ever, we’re hosting “Tails on the Trail,” a pre-festival Fun Run & Walk! We will have two routes available, and pets are welcome to join walkers or runners on either route: Walking participants can enjoy a 1-mile easy-paced walk. Running participants can challenge themselves to a lightly competitive 3.1 mile/5k run. Race entries are $25 for adults and $15 for kids (under 18 years old), and can be purchased on Eventbrite (select “Fun Run” on the dropdown button). Plus, every entry comes with a collectable Unleash the LOVE: Fun Run & Walk shirt! The Festival & Adopt-a-thon from 11:00 am-3:00 pm Entry to our Festival & Adopt-a-thon is free, do don’t hesitate to bring the whole family for an afternoon bounding with joy! We’ll have: Adoptable animals from shelters and rescue groups Food trucks Live music A beer and beverage garden Face painting Games and activities And much more! Register here: https://joybound.org/event/unleash-the-love-2026/ We can’t wait to see you there!
Location: Joybound People & Pets (formerly ARF)
Source: Walnut Creek Chamber of Commerce
More informationJoybound People & Pets presents: Unleash the LOVE: Festival & Adopt-a-thon
Date: 2026-02-07T11:00:00-08:00
Description: 3rd Annual Unleash the LOVE: Festival & Adopt-a-thon. Join us for a fun festival that features adorable adoptable animals and unexpected delights. This year we have added a Fun Run/Walk. Start the day by getting your heart pumping… for a good cause. Proceeds support Joybound’s life-changing programs for shelter animals and the people who love them. This event is family friendly. We can’t wait to see you there!
Location: Joybound People & Pets (formerly ARF)
Source: Walnut Creek Chamber of Commerce
More informationBLS Classes in San Ramon
Date: 2026-02-08T09:00
Description: American Heart Association BLS CPR Certification Courses: Essential Training for Lifesavers The American Heart Association (AHA) Basic Life Support (BLS) CPR certification course is a critical training program designed for healthcare professionals and first responders. This course equips participants with the skills necessary to recognize life-threatening emergencies, provide high-quality chest compressions, deliver appropriate ventilations, and use an automated external defibrillator (AED) effectively. Who Should Take the BLS Course? The BLS CPR certification course is ideal for medical professionals, including doctors, nurses, paramedics, EMTs, dental professionals, medical assistants, and other allied health personnel. It is also required for students entering medical or nursing school, as well as individuals working in hospitals, clinics, or emergency response settings. Many employers in the healthcare field require a valid BLS certification card as a condition of employment. Course Content and Skills Covered The BLS course covers a variety of lifesaving techniques that are essential in both in-hospital and out-of-hospital settings. Key components include: High-quality adult, child, and infant CPR Use of a bag-mask device and AED Two-rescuer CPR techniques Relief of choking in responsive and unresponsive victims Team dynamics and communication during resuscitation The curriculum reflects the latest science from the AHA Guidelines for Cardiopulmonary Resuscitation and Emergency Cardiovascular Care (ECC). Training Formats The American Heart Association offers BLS CPR courses in multiple formats to suit different schedules and learning preferences. Options include traditional classroom training with an instructor, blended learning (a combination of online coursework followed by in-person skills testing), and RQI (Resuscitation Quality Improvement) programs using voice-assisted manikins. These flexible formats make it easier for busy professionals to get certified or renew their certification on time. Certification and Course Duration Upon successful completion of the course and skills evaluation, participants receive an official AHA BLS Provider eCard, valid for two years. The course typically takes about 3 to 4 hours to complete, depending on the format and number of participants. Recertification is required every two years, and refresher courses help maintain skills and stay current with guideline updates. Importance of BLS CPR Certification BLS CPR certification is more than just a professional requirement—it’s a vital skill set that can save lives. Immediate and effective CPR significantly increases the chances of survival for individuals experiencing cardiac arrest. The AHA emphasizes the importance of early CPR and defibrillation as part of the Chain of Survival, a series of actions that improve outcomes in emergency cardiovascular care. Conclusion The American Heart Association BLS CPR certification course is a gold standard in emergency training for healthcare providers. It combines theoretical knowledge with practical skills, preparing participants to respond confidently in critical situations. Whether you’re a seasoned professional or a student entering the medical field, BLS certification is an essential investment in your career and in the safety of your patients and community. Regular training ensures you remain prepared to take lifesaving action when every second counts.
Location: Bishop Ranch 1, 6101 Bollinger Canyon Road Suite 335A
Source: San Ramon Chamber of Commerce
More informationFarmers' Market / Locust Street
Date: 2026-02-08T09:00:00
Description: Nestled on Locust Street between Cole and Lacassie st, the market’s central location makes it accessible to everyone whether you’re walking, biking, driving or riding public transit. Just a short walk from BART. Shop for the season's best, while supporting small family farms. All agricultural products are certified California grown. A Walnut Creek tradition since 1985!
Location: Locust Street between Cole and Lacassie
Source: Walnut Creek Chamber of Commerce
More information2026 BIABA PWB Board & Membership Meeting, Feb. 10
Date: 2026-02-10T16:00:00-08:00
Description: Join the Professional Women in Building Council (PWB) for their monthly board meeting. The PWB encourages networking and empowerment of members as they progress in their careers and fosters professionalism within the building industry. PWB provides a positive environment where female and male members can learn about educational opportunities, mentoring and advancing their business knowledge and promotes the home building industry through support of community organizations. The association’s chapter is part of the National Association of Home Builders (NAHB) Women’s Council.
Location: In Person - Location TBD
Source: BIA|Bay Area
More informationTown Council Meeting
Date: 2026-02-11T17:30:00
Description: No description
Location: Event Location
Source: City of Moraga
More information2026 BIABA DRE Committee Meeting, Feb. 12
Date: 2026-02-12T09:00
Description: Department of Real Estate (DRE) is a committee that monitors the activities and regulations of the state Department of Real Estate. Chair: Chiara Basso, Meritage Homes Vice Chair: Ella Gower, Miller Starr Regalia Vice Chair: Pam Nieting, Nieting Development BIABA Members: Login to Register Non-BIABA Members - Please contact events@BIABayArea.org for registration request.
Location: Via Zoom Register for Link
Source: BIA|Bay Area
More informationMt. Diablo Business Women
Date: 2026-02-12T17:30:00
Description: Monthly meeting featuring 3 speakers! Plus great networking, dinner, and fun (optional) raffle supporting Child Advocates of Contra Costa County. 5:30-8:00 p.m. at The Greenery in Walnut Creek.
Location: The Greenery
Source: Walnut Creek Chamber of Commerce
More informationDanville Area Chamber Monthly Mixer
Date: 2026-02-12T17:30:00-08:00
Description: Join us for the Danville Area Chamber of Commerce's Monthly Mixer, Danville Area Chamber of Commerce Mixers provide a wonderful opportunity to visit with old friends and meet new business contacts. Come enjoy great food and cheer and enjoy our outstanding quality of life! Learn why Danville is the retail, foodie, and service destination most residents and visitors prefer!
Location: 117-E Town and Country Drive, Danville, CA 94526
Source: Danville Area Chamber of Commerce
More informationLOVE BITES Special Valentine´s Menu
Date: 2026-02-13T08:00:00
Description: Enjoy our special Valentine´s Menu available from February 13th to 15th. This menu is $78 per person. Optional wine pairing available upon request: +$30 per person. This menu includes our signature Valentine’s dessert: Sweet Heart, a Basque shortbread with ginger vanilla crémeux and a raspberry heart.
Location: Teleferic Barcelona
Source: Walnut Creek Chamber of Commerce
More informationBourbon Highway Valentine's Stoplight Party
Date: 2026-02-13T20:00:00
Description: Join us Friday, February 13th, starting at 8 PM for our Stoplight Party at Bourbon Highway! Grab your beads at the door and show your relationship status: 🟢 Green = Go 🟡 Yellow = Try Me 🔴 Red = Taken 💵 $10 cover (cash only) Enjoy line dancing, mingling and more.
Location: Bourbon Highway
Source: Walnut Creek Chamber of Commerce
More informationACLS Classes in San Ramon
Date: 2026-02-14T09:00
Description: Advanced Cardiac Life Support: AHA-Certified ACLS Courses The American Heart Association (AHA) Advanced Cardiac Life Support (ACLS) course is a critical training program designed for healthcare professionals involved in the management of cardiopulmonary emergencies. These courses go beyond basic CPR, equipping participants with the advanced skills necessary to respond effectively to cardiac arrest, stroke, and other life-threatening medical emergencies. What is ACLS? ACLS stands for Advanced Cardiac Life Support, and it builds on the foundation of Basic Life Support (BLS) by incorporating more complex interventions. These include airway management, rhythm recognition, intravenous access, medication administration, and post-cardiac arrest care. The course emphasizes the importance of teamwork, leadership, and communication during resuscitation efforts. ACLS is essential for professionals such as physicians, nurses, paramedics, and respiratory therapists who work in emergency departments, intensive care units, or pre-hospital settings. Many employers and licensing boards require current ACLS certification as a condition of employment or credentialing. Core Components of the AHA ACLS Course Participants in the AHA ACLS course learn to: Recognize and manage cardiac arrest and pre-arrest conditions. Perform advanced airway management, including intubation support. Interpret ECG rhythms and identify lethal arrhythmias. Administer emergency medications correctly and safely. Coordinate team-based resuscitation scenarios. Implement effective post-cardiac arrest care protocols. Hands-on practice is an essential part of the course, ensuring that students can apply theoretical knowledge in realistic simulations. Courses are led by certified AHA instructors and follow the latest AHA guidelines based on the most current scientific evidence. Course Format and Certification AHA ACLS courses are available in two formats: Instructor-Led Classroom Course: This traditional format includes lectures, skills stations, and team-based practice sessions conducted in person. Blended Learning (HeartCode® ACLS): This option combines an online self-directed course with an in-person hands-on skills session. Upon successful completion of the course, participants receive an American Heart Association ACLS Provider eCard, valid for two years. Renewal courses are also available for those who are already certified and need to recertify. Why Choose AHA Certification? The AHA is recognized worldwide for setting the highest standards in emergency cardiovascular care training. Their ACLS courses are evidence-based, peer-reviewed, and consistently updated to reflect the latest advancements in medical science. Hospitals and healthcare facilities across the country often require AHA ACLS certification for clinical roles. Conclusion In emergencies where seconds matter, AHA-certified ACLS training empowers healthcare professionals with the advanced knowledge and skills needed to improve patient outcomes. Whether renewing certification or training for the first time, completing an ACLS course is a vital step toward saving lives with confidence and competence.
Location: Bishop Ranch 1, 6101 Bollinger Canyon Road Suite 335A
Source: San Ramon Chamber of Commerce
More informationFarmers' Market / Locust Street
Date: 2026-02-15T09:00:00
Description: Nestled on Locust Street between Cole and Lacassie st, the market’s central location makes it accessible to everyone whether you’re walking, biking, driving or riding public transit. Just a short walk from BART. Shop for the season's best, while supporting small family farms. All agricultural products are certified California grown. A Walnut Creek tradition since 1985!
Location: Locust Street
Source: Walnut Creek Chamber of Commerce
More informationDiablo Symphony Concert: “Mariachi Valentine”
Date: 2026-02-15T14:00:00-08:00
Description: Love is in the air at the Diablo Symphony’s concert “Mariachi Valentine” on February 15 at 2:00 p.m. at the Lesher Center for the Arts. Featuring Oscar Garibay and the UC Davis Mariachi Ensemble, the program includes Alberto Ginastera’s Estancia—with its famous “Malambo”—as well as two mariachi collaborations with the orchestra, “America” and “Huapango.” Garibay, an acclaimed trumpeter in both Northern and Southern California, is director of the UC Davis Mariachi Ensemble as well as of three mariachi ensembles in Orange County. As a classical instrumentalist, he has won several concerto competitions and toured internationally with various orchestras and bands. As a mariachi musician, he has performed on tour with the Grammy Award–winning Mariachi Los Camperos and has accompanied numerous critically acclaimed mariachi artists.
Location: Lesher Center for the Arts
Source: Walnut Creek Chamber of Commerce
More informationBLINKS - Premier Networking Group
Date: 2026-02-17T09:00:00-08:00
Description: Premier Networking Group for Chamber Members wanting that connection of Growth and Scale with Intentional Networking. We are a group capped at 25 Members with only one per business title. Please feel free to contact me to try out our exclusive Networking Group.
Location: Walnut Creek Chamber of Commerce & Visitors Bureau
Source: Walnut Creek Chamber of Commerce
More information2026 BIABA Young Professionals Meeting, Feb. 19
Date: 2026-02-19T12:00:00Z
Description: The Young Professionals of the BIA|Bay Area brings together professionals within our industry that are (generally) 45 and younger. The committee strives to create events and activities to network with other professionals and engage with other councils and committees of the BIA Bay Area.
Location: In Person
Source: BIA|Bay Area
More informationSan Ramon Chamber Ambassador Meeting
Date: 2026-02-19T16:00
Description: San Ramon Chamber Ambassador Meeting
Location: 6101 Bollinger Canyon Road, Bishop Ranch 1, 3rd Floor Conference Room
Source: San Ramon Chamber of Commerce
More informationAris Quartet
Date: 2026-02-21T14:30:00-08:00
Description: Chamber Music San Francisco presents the Aris Quartet at the Lesher Center for the Arts
Location: Lesher Center for the Arts
Source: Walnut Creek Chamber of Commerce
More informationFarmers' Market / Locust Street
Date: 2026-02-22T09:00:00
Description: Nestled on Locust Street between Cole and Lacassie st, the market’s central location makes it accessible to everyone whether you’re walking, biking, driving or riding public transit. Just a short walk from BART. Shop for the season's best, while supporting small family farms. All agricultural products are certified California grown. A Walnut Creek tradition since 1985!
Location: Farmers' Market / Locust Street
Source: Walnut Creek Chamber of Commerce
More informationHEALFEST Family Health Fair!
Date: 2026-02-22T09:00:00
Description: Back on Track Physical Therapy is hosting a booth at the HEALFEST Family Health Fair on Sunday, February 22, 2026 from 9am - 6pm held at the San Ramon Marriott. There will be 7 Renowned Speakers, 40+ Wellness Vendors, FREE Tastings, Demos, Yoga, Dance, Music, and more!!!
Location: San Ramon Marirott
Source: Walnut Creek Chamber of Commerce
More informationThe Joy Group Coaching Cohort | 12-Month Commitment
Date: 2026-02-23T16:00:00-08:00
Description: Joy isn’t a luxury—it’s a lifeline. And, it can live alongside the chaos, the challenges, and the “doing it all.” This fall 2025, step into a space designed just for you—where joy is cultivated and nurtured. THIS is an exclusive cohort. It is not a revolving door so that we can cultivate a brave space for those who need it right now! Participants attending are very committed to their well-being and joy. You must apply and meet with Misha for a FREE 1:1 consultation before you register and pay.
Location: VIRTUAL
Source: Walnut Creek Chamber of Commerce
More informationWalnut Creek Business Watch Launch Event
Date: 2026-02-24T09:00:00
Description: City of Walnut Creek Businesses! Please join us on Tuesday, February 24, 2026, from 9:00 – 10:30 AM at the City Hall Council Chambers for the launch of our brand-new program: Walnut Creek Business Watch A program developed by the Walnut Creek Police Department in partnership with the Walnut Creek Downtown Association and the Walnut Creek Chamber of Commerce & Visitors Bureau.
Location: City Hall - Council Chambers (First Floor)
Source: Walnut Creek Chamber of Commerce
More informationTRAVEL ADVENTURES LUXURY TRAVEL SHOW
Date: 2026-02-24T11:00:00-08:00
Description: Join the Travel Adventures Luxury Travel Show! Join us for an exclusive in-person event designed to inspire your next luxury journey. Connect face-to-face with premier travel suppliers, explore carefully curated destinations, and gain insider knowledge through brief presentations and personal table-side conversations. Featured luxury partners include AmaWaterways, Ponant, Paul Gauguin Cruises, Rocky Mountaineer, Regent Seven Seas Cruises, Insight Vacations, and Abercrombie & Kent (A&K). Light refreshments will be available throughout the event. Attendees will enjoy access to special booking promotions available only at the show. Doors open at 11:00 AM. Metered parking is available along California Blvd and nearby at the Lesher Theater Garage.
Location: Prime Steakhouse & Martini Garden
Source: Walnut Creek Chamber of Commerce
More informationState of the City / Future of Walnut Creek
Date: 2026-02-25T11:30:00
Description: Join us on Wednesday, February 25, 2026, at the Center for Community Arts Auditorium in Shadelands as we hear about the State of Walnut Creek and what lies ahead. Lunch and networking at 11:30am, the program starts at Noon. Topics include: Fireside ...
Location: Center for Community Arts - Auditorium
Source: Walnut Creek Chamber of Commerce
More informationM3 Meeting - Maximize Your Membership Meeting
Date: 2026-02-25T17:00
Description: Whether you're a new, existing, or prospective member, the San Ramon Chamber's M3 gathering - Maximize Your Membership Meeting- is designed to provide you with a complete overview of our Chamber's resources, tools, and programs so that you can maximize your membership. If you're already a member, you're linked to the hundreds of member companies doing business in the San Ramon Tri-Valley. Take the next step and learn how you can engage, utilize your benefits, make connections, and take advantage of additional opportunities, such as sponsorship and advertising, for your business. Agenda: 5:00 - 5:30 Networking and Introductions 5:30 - 6:30 Presentation and Q&A 6:30 - 7:00 Networking We will have some of our Board Members, Ambassadors, and the Chamber's President/CEO, Danielle Cook, here to greet you. The meeting is casual, and 1 to 20 people are in attendance. Kindly RSVP if you wish to attend. The San Ramon Chamber's M3 gatherings are held once every quarter. Check the Chamber Events listings for your next opportunity. If you need immediate assistance getting support for your membership, please get in touch with us at info@sanramon.org.
Location: San Ramon Chamber of Commerce
Source: San Ramon Chamber of Commerce
More informationTown Council Meeting
Date: 2026-02-25T17:30:00
Description: No description
Location: Event Location
Source: City of Moraga
More informationWalnut Creek Chamber of Commerce & Visitors Bureau Orientation Meeting
Date: 2026-02-25T16:00:00-08:00
Description: Join us at our orientation for new members, existing members and prospective members. This meeting offers an overview of the Chamber, programs and events, public policy initiatives and activities, sponsorship opportunities, networking, and ways to get involved.
Location: Walnut Creek Chamber of Commerce & Visitors Bureau - CA
Source: Walnut Creek Chamber of Commerce
More informationRibbon Cutting Celebration - Primrose School of San Ramon
Date: 2026-02-26T17:00
Description: Please join the San Ramon Chamber of Commerce for a Ribbon-Cutting celebration at Primrose School in San Ramon. Everyone is welcome! Primrose Schools® is a national system of accredited private preschools that provides a premier early education and childcare experience for children and families.
Location: Primrose School of San Ramon
Source: San Ramon Chamber of Commerce
More informationFebruary 2026 BASH at C.O.P.E. Family Support Center
Date: 2026-02-26T17:30:00-08:00
Description: Join us for our February Chamber Networking Event at C.O.P.E. Family Support Center in Walnut Creek! Connect with fellow Chamber members, build meaningful relationships, and expand your network in a welcoming and purpose-driven environment. C.O.P.E. Family Support Center is a vital nonprofit serving families in our community, and this event is a great opportunity to learn more about their mission while making valuable business connections. Enjoy engaging conversations, community spirit, and the chance to strengthen your involvement in Walnut Creek’s thriving business community. We look forward to seeing you there!
Location: C.O.P.E. Family Support Center, Inc.
Source: Walnut Creek Chamber of Commerce
More informationFarmers' Market / Locust Street
Date: 2026-03-01T09:00:00
Description: Nestled on Locust Street between Cole and Lacassie st, the market’s central location makes it accessible to everyone whether you’re walking, biking, driving or riding public transit. Just a short walk from BART. Shop for the season's best, while supporting small family farms. All agricultural products are certified California grown. A Walnut Creek tradition since 1985!
Location: Locust Street between Cole and Lacassie st
Source: Walnut Creek Chamber of Commerce
More informationBALLOT COUNTING AND MEETING NOTICE
Date: 2026-03-02T09:00:00
Description: Ballots will be counted on Mar. 2, 2026 at 9:00am during a meeting open to all members.
Location: 300 Greenbrook Drive
Source: Greenbrook Homes Association Inc
BOD ANNUAL MEETING
Date: 2026-03-02T18:00:00
Description: Board of Directors Annual Meeting for Greenbrook Homes Association, where the Board elects homeowners to serve on the Board of Directors.
Location: Clubhouse
Source: Greenbrook Homes Association Inc
BLINKS - Premier Networking Group
Date: 2026-03-03T09:00:00
Description: Premier Networking Group for Chamber Members wanting that connection of Growth and Scale with Intentional Networking. We are a group capped at 25 Members with only one per business title. Please feel free to contact me to try out our exclusive Networking Group.
Location: Walnut Creek Chamber of Commerce & Visitors Bureau
Source: Walnut Creek Chamber of Commerce
More informationFarmers' Market / Locust Street
Date: 2026-03-08T09:00:00
Description: Nestled on Locust Street between Cole and Lacassie st, the market’s central location makes it accessible to everyone whether you’re walking, biking, driving or riding public transit. Just a short walk from BART. Shop for the season's best, while supporting small family farms. All agricultural products are certified California grown. A Walnut Creek tradition since 1985!
Location: Locust Street
Source: Walnut Creek Chamber of Commerce
More informationDanville Area Chamber Monthly Mixer
Date: 2026-03-12T17:30:00Z
Description: Join us for the Danville Area Chamber of Commerce's Monthly Mixer, Danville Area Chamber of Commerce Mixers provide a wonderful opportunity to visit with old friends and meet new business contacts. Come enjoy great food and cheer and enjoy our outstanding quality of life! Learn why Danville is the retail, foodie, and service destination most residents and visitors prefer!
Location: 117-E Town and Country Drive, Danville, CA 94526
Source: Danville Area Chamber of Commerce
More informationPianist Angela Hewitt
Date: 2026-03-14T14:30:00-08:00
Description: Chamber Music San Francisco presents pianist Angela Hewitt
Location: Lesher Center for the Arts
Source: Walnut Creek Chamber of Commerce
More informationFarmers' Market / Locust Street
Date: 2026-03-15T09:00:00-08:00
Description: Nestled on Locust Street between Cole and Lacassie st, the market’s central location makes it accessible to everyone whether you’re walking, biking, driving or riding public transit. Just a short walk from BART. Shop for the season's best, while supporting small family farms. All agricultural products are certified California grown. A Walnut Creek tradition since 1985!
Location: Locust Street
Source: Walnut Creek Chamber of Commerce
More informationBLINKS - Premier Networking Group
Date: 2026-03-17T09:00:00
Description: Premier Networking Group for Chamber Members wanting that connection of Growth and Scale with Intentional Networking. We are a group capped at 25 Members with only one per business title. Please feel free to contact me to try out our exclusive Networking Group.
Location: Walnut Creek Chamber of Commerce & Visitors Bureau
Source: Walnut Creek Chamber of Commerce
More informationFarmers' Market / Locust Street
Date: 2026-03-22T09:00:00
Description: Nestled on Locust Street between Cole and Lacassie st, the market’s central location makes it accessible to everyone whether you’re walking, biking, driving or riding public transit. Just a short walk from BART. Shop for the season's best, while supporting small family farms. All agricultural products are certified California grown. A Walnut Creek tradition since 1985!
Location: Locust Street between Cole and Lacassie st
Source: Walnut Creek Chamber of Commerce
More information
UpcomingCivic Events
View upcoming events in Contra Costa County