Summer in California is prime half marathon season—mild mornings, scenic courses, and a race for every style. Whether you're chasing a PR or a post-race toast, the Golden State delivers. Here are four standout events to put on your calendar.
2026 Napa to Sonoma Wine Country Half Marathon & Rosé 5K
Saturday, July 25, 2026 | Napa This runner-favorite race (Quality Score: 78) winds through vineyards and finishes with a rosé celebration. It's the perfect blend of scenic running and wine country indulgence.
2026 Lake Chabot Trail Challenge (Half Marathon & 5K)
Sunday, June 7, 2026 | Castro Valley With a Quality Score of 73, this trail half offers stunning lake views and a challenge for those who love dirt underfoot. Great for trail newbies and veterans alike.
Hell Of A Half Marathon & 2 Person Relay
Saturday, August 8, 2026 | Exeter Quality Score: 70. Known for its tough, scenic course through the foothills, plus a relay option for teams. A true adventure for those seeking a challenge.
Bad Bass Half Marathon
Saturday, July 18, 2026 | Castro Valley Quality Score: 67. A fun, community-focused race with a unique theme. Ideal for runners looking for a low-key, festive atmosphere.
These are just a few of the 13 upcoming half marathons in California. Ready to find your next race? Check out the full Half marathons in California directory and start planning your summer adventure.