California is a dream destination for half marathon runners. From the rolling vineyards of Napa to the riverfront paths of Sacramento, the state serves up courses that are as scenic as they are rewarding. Whether you're chasing a personal best or just looking for an excuse to explore a new corner of the Golden State, the next few months are packed with great options. Here are four standout half marathons coming up this summer and fall — all worth adding to your calendar.
Bad Bass Half Marathon
- Date: Saturday, July 18, 2026
- Location: Castro Valley, California
- Quality Score: 67 (Standout)
Kicking off the summer season, the Bad Bass Half Marathon offers a challenging and scenic loop course around Lake Chabot. With rolling hills and stunning lake views, this race is ideal for runners who want a mix of nature and grit. The small-field vibe means less crowding and more personal attention at aid stations. It’s a great early-summer tune-up or a first half for those who like a quieter start line.
2026 Napa to Sonoma Wine Country Half Marathon & Rosé 5K
- Date: Saturday, July 25, 2026
- Location: Napa, California
- Quality Score: 78 (Standout)
Arguably one of the most picturesque half marathons in the country, the Napa to Sonoma Wine Country Half Marathon takes you through rolling vineyards and alongside the scenic Carneros region. The point-to-point course finishes with a festival featuring wine tasting, live music, and plenty of rosé. It’s a bucket-list race for many — and with a July date, you get to enjoy the summer warmth and longer daylight hours. Registration often sells out, so early planning is key.
Hell Of A Half Marathon & 2 Person Relay
- Date: Saturday, August 8, 2026
- Location: Exeter, California
- Quality Score: 70 (Standout)
Don’t let the name intimidate you — the Hell Of A Half Marathon is more fun than fearsome. Set in the agricultural heart of Tulare County, this race delivers a mix of country roads and gentle climbs. The two-person relay option makes it a great choice for friends or couples who want to share the miles. Expect strong community support and a finish-line party that feels like a small-town celebration. It’s a hidden gem for those looking to try something off the beaten path.
Urban Cow Half Marathon
- Date: Sunday, September 27, 2026
- Location: Sacramento, California
- Quality Score: 85 (Runner Favorite)
Rounding out the lineup is the Urban Cow Half Marathon, a longtime favorite in Sacramento. The course takes runners along the scenic American River Parkway, offering flat and fast terrain that’s perfect for a PR attempt. The post-race festivities, including a cow-themed party and local food vendors, make it a celebration from start to finish. With a Runner Favorite quality score of 85, this race consistently earns high marks for organization, course beauty, and community spirit.
Find Your Next California Half Marathon
These four races are just a taste of what California has to offer. Whether you're drawn to wine country, lake views, country roads, or river trails, there's a half marathon here waiting for you. Ready to explore all the options? Check out our full directory of half marathons in California to see upcoming dates, courses, and more. Your next adventure starts now.