Fremont
Trail Running Calendar near Fremont 2026-2027
Explore the top trail runs near Fremont for 2026-2027! We've gathered 64 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
October 2026
Trail races on Mount Diablo near Walnut Creek on October 17, 2026 offering 30K, Half Marathon, 10K and 5K with possible mud and creek crossings.
A multi-distance in-person and virtual run along the Coastal Trail in Half Moon Bay that raises funds for Senior Coastsiders' programs for older adults.
An October fundraiser offering a global virtual challenge plus an in-person event at San Francisco’s Ferry Building. Multiple distances from 5K to 50K are available; some courses are unmarked and maps are provided. Proceeds support the Breast Cancer..
November 2026
Trail trail event at Huddart Park in Woodside offering distances from a 1 mile kids dash to a Sirena 6 hour individual and relay challenge.
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.
A Thanksgiving Day 5K and 1 mile event at San Leandro Marina with canicross teams, kids races, and proceeds benefiting animal welfare; the course is flat with mixed surfaces and free parking is available.
A Thanksgiving weekend race at Quarry Lakes offering a half marathon, 10K, 5K and a free short Little Turkeys run, plus a food drive and a two-day medal challenge.
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.
Trail running at Calero County Park near San Jose on Dec 5, 2026, offering distances from a kids run to a 50K with marked courses and aid stations.
Single-loop urban ultramarathon in San Francisco from Twin Peaks offering 50 mile and 50K options, informal aid stations, and a mile 25 cutoff.
Trail races through redwood groves in Sanborn Regional Park on December 12, 2026 with 5K, 10K and half marathon options, chip timing and finisher medals.