Trail Running calendar near Clayton 2026-2027

A themed charity run and community festival on October 18, 2026 in Downtown Roseville, CA, supporting the bleeding disorders community. The day includes a timed 5K, a one mile walk, festival food, carnival games, and a remembrance ceremony.

An endurance event at Beals Point in Granite Bay where runners complete an hourly 4.16 mile loop until one remains. A 12 hour Mini Last Person Standing uses the same format with a fixed time limit.

A repeating 4.16-mile trail loop event at Beals Point where runners start a new lap each hour until one remains; a Mini version ends after 12 hours. Aid is only at the start/finish and personal aid areas are encouraged.

Trail races near Pilot Hill, CA featuring a half marathon and a 10K on singletrack with creek crossings and views; the event is a fundraiser for the American River Conservancy and is limited to 175 participants.

Trail marathon, half marathon and 10K in Bothe-Napa Valley State Park on October 24, 2026, limited to 300 runners. Single-track course with hills, streams and rocky sections; orange ribbon markings, one aid station, no headphones allowed.

Trail races in Redwood Regional Park near Oakland on October 24, 2026 include 10K, half marathon and 35K with significant elevation gain. The event uses chip timing, cupless aid stations and has a 330 runner capacity.

A Halloween-themed running event at Hellyer County Park with 5K, 10K, half and full marathon distances, youth divisions, a free kids' dash, a costume contest, certified half and full courses, aid stations every 2-4 miles, and cupless hydrat..

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.

Support student programs and the Oakland Tech Cross Country team at Joaquin Miller Park. Choose between a five kilometer trail race or a one mile fun run through the redwood trees.

Event Details The Rio Del Lago 100 Mile Endurance Run is a trail race held on Saturday, November 7, 2026, starting at Beal's Point in Folsom Lake State Recreation Area, within the Sierra Foothills of California. Course Information The 100-m..

A trail event at Huddart Park on November 7, 2026 featuring multiple distances, a 6 Hour Challenge and a youth dash, with aid stations, chip timing and a post race pancake breakfast.

A trail race at Lake Chabot Regional Park in Castro Valley offering distances from an 8K and half marathon up to 50K plus a free kids 50 yard dash. The course loops the reservoir with marked routes, aid stations every 4 to 5 miles, and cupl..

Trail races from 10K to 50K based at Stinson Beach with steep climbs to Mt. Tam, technical trails, chip timing, cupless aid stations, and age-group and overall awards.

A fall trail event at Rancho Cañada del Oro Open Space Preserve offering distances from 5K to 50K on hilly single-track and dirt roads, with aid stations, multiple water stops, strict cutoff limits, and limited parking.

A flat trail event at Quarry Lakes Regional Recreation Area offering 5K, 10K, half marathon and youth races, cupless aid stations every 2–5 miles, and a USATF-certified half marathon course.

A map-based trail scramble in Santa Cruz where solo entrants or teams up to five use a custom map to find up to 20 checkpoints across redwood and mixed forests and meadows in 2 hour or 4 hour formats, with refreshments at the finish.

A multi-distance trail event in the El Dorado Hills foothills offering routes from 5K to a trail marathon on mostly single-track dirt with rolling hills, aid stations, drop-bag service, and a creek crossing.

Trail race at Darrington Trail Head by Folsom Lake offering 5K, 10K, 18M and 36M on rocky single-track with rolling hills, aid stations, drop bags, and a 10-hour overall time limit.

Celebrate Thanksgiving at Hellyer County Park with a trail race along Coyote Creek. Choose from a USATF certified half marathon, 10K, or 5K while competing for a chance to win a turkey.

A 28.4 mile out and back trail event from Old Mill Park to Stinson Beach with about 9,000 feet of vertical gain. The route follows the Dipsea Trail, includes multiple named trail sections and aid stations, and is repeated for the Quad.