JAMBAR Named Founding Partner of Siesta Valley Bowl
Rooted in shared Bay Area history, the partnership connects Jennifer Maxwell’s legacy in sports nutrition, music, and active living with Siesta Valley Foundation’s vision for a renewed East Bay cultural landmark.
ORINDA, Calif. (June 25, 2026) — Siesta Valley Bowl today announced JAMBAR, the certified organic energy bar company founded by PowerBar® co-creator Jennifer Maxwell, as its first founding partner. JAMBAR will be the official energy bar of the intimate outdoor amphitheater (former home of Cal Shakes), located in the Berkeley Hills in Orinda.
This new partnership brings together two Bay Area businesses that share an appreciation for live music, active living, and community. JAMBARs will be sold at concessions and featured throughout the venue through signage including the newly named JAMBAR Athlete’s Gate, which marks the opening to the outdoor areas of the property and connects the amphitheater to surrounding open space, nearby trails, and the Skyline Trail. JAMBAR will be a big part of their first July music event with The Breaks on July 2.
As part of the relationship, JAMBAR is also partnering with Siesta Valley Foundation, aligning with JAMBAR’s giveback commitment to support organizations advancing music and active living. JAMBAR donates 50% of after-tax profits to these causes.
“Siesta Valley Bowl sits at the intersection of music, nature, and active living. Visitors can spend the afternoon on the trails, refuel with a JAMBAR, and then settle in for an unforgettable performance under the stars,” said Campbell Foster, Chairman and Founder of Siesta Valley Foundation. “That's exactly why JAMBAR is such a natural founding partner for us. There’s a meaningful alignment of shared values.”
Set in a redwood grove with views of the surrounding Berkeley-Orinda Hills, Siesta Valley Bowl offers artists and audiences an intimate live music experience in one of the region’s most scenic outdoor settings. The 1,000-person-capacity venue is located on a protected East Bay Municipal Water District (EBMUD) watershed, and is operated by Siesta Valley Bowl, Inc. through a public-private partnership with Siesta Valley Foundation and EBMUD, combining culture with environmental stewardship and community engagement.
For Maxwell, the partnership is a natural extension of JAMBAR’s roots and mission. A University of California, Berkeley graduate, Maxwell helped launch the sports nutrition category when she co-founded PowerBar in Berkeley in 1986. She later founded JAMBAR in 2021 around her lifelong passions for real-food nutrition, athletic performance, and music.
“The East Bay has shaped so much of my life, from going to Cal and starting PowerBar in Berkeley to running the East Bay trails and playing music in the community today,” said Jennifer Maxwell. “Siesta Valley Bowl brings together many of the things that matter to me and to JAMBAR. For organizations like Siesta Valley Bowl to thrive, they need businesses and individuals to financially support their mission. We value the creativity and joy that they bring, and are proud to be a sponsor.”
The site’s cultural roots date back to Cal Shakes, which helped define the amphitheater as a beloved East Bay arts destination for decades. Today, Siesta Valley Bowl is building on that history with a renewed focus on live music, arts programming, community gathering, and partnerships with local theater groups and cultural organizations.
With premium sound quality, exceptional food and beverage options, and a secluded watershed location, Siesta Valley Bowl is poised to become a defining outdoor music destination for the East Bay, while also supporting a broader vision for theater, family programming, outdoor recreation events, and conservation efforts.
The venue opened its doors on June 5 with a performance by proto-punk legend Jonathan Richman, launching its inaugural concert series featuring more than 20 national touring artists across a wide range of styles and genres. One of this season's signature performances arrives July 2, when Siesta Valley Bowl welcomes The Breaks, a powerhouse supergroup featuring Stanton Moore (Galactic), Eddie Roberts (The New Mastersounds), and Robert Walter (Greyboy Allstars). Together, they bring decades of funk, soul, jazz, and improvisational firepower to one stage. Opening the evening are jazz-funk pioneers The Headhunters, whose groundbreaking recordings helped shape modern funk and continue to influence generations of musicians. The double bill reflects Siesta Valley Bowl's commitment to presenting exceptional artists in an intimate outdoor setting designed for both music lovers and performers.
As Siesta Valley Bowl continues to build its inaugural season, the partnership with JAMBAR marks an important early milestone for the venue’s new chapter — one rooted in East Bay creativity, active living, live music, and community connection.
About Siesta Valley Bowl
Siesta Valley Bowl is a 1,000-person-capacity outdoor amphitheater located in the Berkeley Hills in Orinda, California, and the former home of the acclaimed California Shakespeare Theater. Operating under a 15-year lease signed in November 2025, the venue brings world-class live music, premium sound quality, and an exceptional culinary experience to the East Bay in an intimate, scenic watershed setting. Siesta Valley Bowl is committed to showcasing a diverse roster of national touring artists and supporting the local arts community through its affiliated nonprofit, the Siesta Valley Foundation.
About Siesta Valley Foundation
The Siesta Valley Foundation is a 501(c)(3) nonprofit organization dedicated to supporting arts education, cultural programming, environmental stewardship, and community engagement in the East Bay. Through its partnership with Siesta Valley Bowl, Inc. and EBMUD, the Foundation supports the long-term vision for the historic amphitheater as a place where arts, nature, and community come together.
About JAMBAR
In 2021, Jennifer Maxwell founded JAMBAR with the goal of helping people feel good about the ingredients they put in their bodies, and the positive impact they can have on their local communities. JAMBAR organic energy bars are made in the U.S. and crafted in small batches in the company's state-of-the-art manufacturing facility in California. A woman-owned, mission-driven business, JAMBAR donates 50% of after-tax profits to organizations that support active living and music. JAMBARs are available in natural foods and grocery stores, sports specialty stores, and online at Amazon.com. Learn more at www.jambar.com and follow JAMBAR on Facebook and Instagram.
Media Contact
Steven Hoffman, Compass Natural, steve@compassnatural.com, tel: 303.807.1042