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Trail Running Calendar near Belmont 2026-2027

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Explore the top trail runs near Belmont for 2026-2027! We've gathered 62 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.

October 2026
Trail races at Redwood Regional Park offering 35K, half and 10K options on technical dirt trails with marked courses, chip timing, cupless aid stations, and limited field size.
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.
A team relay across San Francisco trails covering nearly 13 miles and over 2,000 feet of elevation, with five segments and teams of up to five runners for a $50 entry.
A trail run by Bay Area Run Crew at Stevens Creek Reservoir featuring varied terrain, trail-ready gear recommendations, and a post-run social at Voyager Craft Coffee.
Trail races in Almaden Quicksilver Park from 5K to 50K over hilly dirt roads and single-track, with two staffed aid stations, drop-bag service for longer distances, and a finisher medal for all participants.
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.
Trail races at Huddart Park in Woodside on November 7, 2026, with distances from 3 miles to a half marathon, a looped 6 hour challenge, kids dash and virtual options.
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.
Experience a flat and fast trail race through the scenic Quarry Lakes Regional Recreation Area in Fremont. Choose from a USATF certified half marathon, 10K, or 5K while enjoying views along the Alameda Creek Trail.
Nomadic Adventure Club's 11th annual 5K trail run at Arbolado Park in Walnut Creek with family activities and Mongolian food after the event.
A Thanksgiving Day vegan fundraiser at San Leandro Marina featuring a flat 5K, canicross with dogs, a 1 mile walk, and kids races supporting the Milo Foundation.
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 San Francisco cross country event on Sunday, December 6, 2026 offering 5K, 10K and a Naughty Nine Miler with live and virtual options and race swag for all.
Trail races from a kids run to a 50K at Calero County Park in San Jose with varied single track, multiple aid stations, free parking, and drop bag support for the 50K.
Urban single-loop ultrarun in San Francisco from Twin Peaks offering 50K and 50 mile options with volunteer-supported aid and a mile 25 cutoff.
A memorial 5K on Baker Beach honoring a longtime DSE member, featuring a mixed surface course with a wooden bridge and parking at the upper lot.
A community fundraiser at Joaquin Miller Park featuring a 5K trail run and a 1 mile kids fun run on 12/06/2026.
Trail races at Sanborn Regional Park on December 12, 2026: 5K, 10K and half marathon through redwoods with chip timing and finisher medals.
Looped trail races on Angel Island with panoramic Bay views; includes a half marathon (two loops) and a 10K, ferries required and the field is limited to 400.
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