Clayton
Trail Running Calendar near Clayton 2026-2027
Explore the top trail runs near Clayton for 2026-2027! We've gathered 37 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
October 2026
A 12.4 mile loop from Mitchell Canyon to the Mount Diablo summit and back, with about 4,000 feet of elevation change, a 5 hour cutoff, and shuttle service.
Trail races on Mount Diablo in Walnut Creek on October 17, 2026 offering 30K, half marathon, 10K and 5K on hilly trails with possible mud and creek crossings.
Cross-country races at Radke Martinez Regional Shoreline on October 24, 2026 featuring three identical 4.1 mile races on grass, dirt, and path surfaces.
Virtual worldwide challenge and an in-person gathering at the San Francisco Ferry Building on October 24, 2026, fundraising for the Breast Cancer Research Foundation.
November 2026
A fundraiser in Joaquin Miller Park featuring a 5 km trail race and a 1 mile fun run to support Oakland Tech PTSA and student programs.
Experience a scenic trail run around the Lake Chabot reservoir and hills. With distances from a 50 yard kids dash to a 50K ultramarathon there is an option for everyone at this Castro Valley event.
11th annual 5K trail run at Arbolado Park in Walnut Creek with free registration, Mongolian food, kids activities and community-focused programming.
Thanksgiving Day 5K and canicross fundraiser at San Leandro Marina with races for adults and kids, vegan refreshments, and animal welfare fundraising.
Quarry Turkey in Fremont offers a half marathon, 10K, 5K and a virtual race over Thanksgiving weekend, plus a Little Turkeys kids race and a food drive.
December 2026
A seasonal cross country event in San Francisco on 12/6/2026 with live and virtual options. Distances include a 5K, 10K, and a nine mile course; all entrants receive race swag and there is a pre race bib and shirt pickup with Brewfest.
An urban 50K and 50 mile fat ass run from Twin Peaks in San Francisco, with volunteer aid stations and a four hour forty five minute cutoff at mile 25.
Youth focused event in Oakland with a 1 mile kids fun run and a 5K trail run at Joaquin Miller Park, with limited parking and packet pickup before the race.
New Year's Eve at Lake Chabot in Castro Valley offers trail races on December 31, 2026, with a half marathon, 10K and 5K; walkers and hikers are welcome and free photos are provided.
January 2027
Multi-distance trail races at Lake Chabot across New Year's Eve and New Year's Day, including 5K, 10K, a half marathon and a virtual option.
Trail running weekend in San Francisco that crosses the Golden Gate Bridge and runs through the Marin Headlands, with multiple race distances and spectator access.