Clayton
Trail Running Calendar near Clayton 2026-2027
Explore the top trail runs near Clayton for 2026-2027! We've gathered 41 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
August 2026
A map based 5K and 10K navigation event in Fillmore and Japantown, San Francisco, with team options, checkpoint questions, and post event refreshments.
Limited field trail races on Angel Island with a 10K single loop and a half marathon that completes two loops, with ferry included in registration.
September 2026
Monthly community hike with an optional trail run in Richmond, organized by FIERCE Advocates and local partners on first Saturdays in 2026.
Trail races at Tilden Regional Park in Berkeley with distances from 10K to 50K, cupless aid stations about every 5–7 miles, and a 350-runner capacity.
A 40th edition cross country meet in Golden Gate Park with an approximately 4 mile two loop course over grass, dirt, and rolling hills.
Trail event in Castro Valley featuring a 100k, 50 mile, and marathon with UTMB index status and firm time limits due to park permits.
October 2026
Multi-day event at McNear’s Beach Park in San Rafael featuring an Olympic triathlon, relay, a kids triathlon, a trail half marathon, and a combined challenge.
A 12.4 mile loop from Mitchell Canyon to the Mount Diablo summit and back with about 4,000 feet of climbing and a five hour cutoff.
Trail races of 5K, 10K, half marathon and 35K around San Pablo Reservoir on EBMUD trails, with chip timing, stocked aid stations, a cupless policy, and a 300-runner capacity.
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 cross-country meet at Radke Martinez Regional Shoreline on October 24, 2026 with three 4.1 mi races over grass, dirt, and path terrain.
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
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.