Trail Running calendar near San Ramon 2026-2027

Trail runs of 10K, Half Marathon and 30K around Mt. Tam and Muir Woods with steep climbs, technical single track, aid stations and a cupless policy; event capacity is 300 and chip timing is used.

The Rodeo Valley Trail Run will take place in Sausalito on Saturday 1 August 2026. You can run between 8 and 50 kilometers.

Skyline 50K runs August 2, 2026 at Lake Chabot Marina in Castro Valley, featuring a scenic loop through East Bay Regional Parks. One of the nation's oldest 50K races, it welcomes first time ultrarunners and includes a half marathon option.

Run among towering redwoods in Oakland on August 15 at the Redwood Summer Trail Run, with distances from a 5 mile to an epic 50K plus a free kids dash. Expect stocked aid stations, finish medals and classic trail vibes.

The Tamalpa Headlands 50K will take place in Mill Valley on Saturday 15 August 2026. You can run 50 kilometers.

Run scenic single track through Huddart Park, King's Mountain and Bear Gulch with options from 8K up to 50K, plus a free kids dash. Fully stocked aid stations and classic California trail views make for an unforgettable day on the trails.

Trail races from 4 miles to 50K take place on Mount Diablo on September 6 2026. Courses are marked with ribbons and polka dot flagging and aid stations appear every 3 to 5 miles.

Trail races in Tilden and Wildcat Canyon on September 12, 2026 feature 10K, half marathon, 35K and 50K routes over dirt trails and fire roads with notable bay and Golden Gate Bridge views. Aid stations are spaced every 5 to 7 miles and the..

Experience challenging trails around Lake Chabot on September 26, 2026 with races from a 100k to a marathon, including a 50 mile USATF Grand Prix event. Enjoy scenic singletrack, supportive aid stations, and memorable finishers awards.

Trail races through shaded redwood forest on the eastern slopes of the Santa Cruz Mountains with long climbs and flowy singletrack; distances include 50K, half marathon and 10K.

Run by the Sea returns Sunday, October 4, 2026 at Wilder Ranch State Park in Santa Cruz with 4K, 12K and a half marathon on scenic coastal trails. Now in its 101st year, this charity race supports local youth and trail groups.

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.

Experience the Sonoma Fall Classic in Healdsburg wine country where ultrarunning tradition meets festival fun. Choose marathon, Lake Sonoma 50 Mile, ultramarathon and relay options and celebrate trails, community and harvest.

A Halloween-themed running event in San Jose offering 5K, 10K, half marathon and marathon plus youth races and a free kids dash. The half and marathon courses are USATF certified and the event features aid stations and a costume contest.

Enjoy a scenic but hilly trail run at Huddart Park with distances from 3 mile to half marathon, plus a 6 hour challenge and youth dash. Stay for pancakes after the race and choose a virtual option for 5K, 10K or half marathon.

Celebrate Thanksgiving at the Zoom Turkey Trot in Hellyer County Park, San Jose with family friendly distances from a free kids dash to a USATF certified half marathon. Park entry is included and every finisher earns a medal.

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.