Trail Running calendar near Lake Sonoma 2026-2027

Join the Wine Half Marathon in Napa Valley on May 9, 2026, a 13.1 mile route through vineyards from Rutherford to Yountville. Founded by four French American wine professionals, the race blends warm hospitality, surprises, and scenic trails..

Trail runs at Skyline Wilderness Park in Napa with 50K, 30K, 21K and 10K options. Routes include steep Rim Rock climbs, summit views, cupless aid stations, and on-course water-only sections for longer distances.

Rim Rock 50 Mile Trail Challenge in Napa Valley is a scenic yet rugged two loop course through oak woodlands and exposed ridgelines at Skyline Wilderness Park. Run solo for 50 mile glory or team up for a two person relay and tackle the terr..

Trail trail race at Wildcat Canyon Regional Park near El Sobrante offering a half marathon, 10K and 5K with wide Bay Area views, chip timing, medals and shirts. Walkers and hikers are welcome.

Trail runs at China Camp State Park on May 23, 2026 feature 5K, 10K and half marathon courses on single track and fire roads with prominent climbs, marked aid stations, a cupless policy, and limited field size.

Nitro Trail 2026 is a trail running event at Point Pinole Regional Shoreline Park in San Pablo, CA on May 30, 2026, offering a half marathon, 10K and 5K. Organized by Brazen Racing, it includes a remote runner option and volunteer-supported..

The Dirt Circus - San Francisco will take place in San Francisco on Saturday 6 June 2026. You can run between 3 and 5 miles.

The Bay 2 Bankers 10K will take place in Crissy Field East Beach on Saturday 4 July 2026. You can run between 5 and 10 kilometers.

Trail races on Mt. Tam near Stinson Beach offering 10K, half marathon, and 30K courses with steep climbs, technical single-track, cupless aid stations, chip timing, and a 300-runner capacity.

Trail races at Rodeo Beach in the Marin Headlands offering 8K, half marathon, 30K and 50K on coastal singletrack and fire roads; chip timed, cupless, capacity 350.

A single loop 50K ultramarathon in Muir Beach, California on Saturday, August 15, 2026. The course uses notable Marin trails, includes about 6500 feet of elevation gain, and features coastal and Bay Area views.

A weekend running festival set in Mendocino Woodlands Park with 12 hour and 6 hour timed events plus 10K and half marathon on a six mile redwood loop. Weekend camping, food passes, live music, and camp facilities are included.

Trail races on September 12, 2026 in Tilden Regional Park and Wildcat Canyon offering 50K, 35K, half marathon and 10K courses with marked trails, aid stations every five to seven miles, and a cupless format requiring reusable cups or bottle..

Run the 39th Ruth Anderson Memorial Endurance Run on October 10, 2026 in San Francisco. Choose 100 km, 50 miles, or 50 km on a scenic paved loop around Lake Merced with chip timing and certified 50K and 50 mile courses.

A multi-distance trail running festival in Healdsburg during harvest, combining the Lake Sonoma 50 with a new 100 mile race, a trail marathon, and relay options on nearby trails.

Join the festive Krampus Cross Country in San Francisco with live and virtual options Dec 4 to 7 and the in person race on Dec 6. Pick 5K, 10K or the Naughty Nine Miler and take home a woodallion, tee and beer sampler stein.

The Hunter S. Thompson Fear & Loathing will take place in San Francisco on Sunday 6 December 2026. You can run between 50 and 50 miles.