Trail Running calendar near Glen Ellen 2026-2027

Trail running event in Las Trampas Wilderness on September 19, 2026, offering a half marathon, 10K and 5K with hilly trail terrain and scenic vistas. Remote participation options and a parks campership fundraiser are included.

Dick Collins Firetrails in Castro Valley features a 100k, a 50-mile race, and a marathon on Lake Chabot park trails. The event is UTMB Index and the 50-mile race counts toward the Pacific USATF Grand Prix.

JP's Backyard Ultra/Hike is a final edition event in Napa's Skyline Wilderness Park. Participants run or hike a 3.3-mile loop, choosing their own distance up to 33 miles. This free event is a fundraiser, with a suggested donation supporting..

Trailblazer Race in Mountain View offers 10K, 5K, a 3-mile walk and a kids 1-mile run on Stevens Creek Trail and Shoreline Park, plus a festival and activities. Proceeds benefit Friends of Stevens Creek Trail.

Experience a trail half marathon on San Bruno Mountain featuring 2,400 feet of elevation gain and stunning views. Enjoy a scenic route with 93 percent trail coverage followed by a post race meal and finishers medal.

Test your endurance at Lake Merced in San Francisco with a scenic 4.5 mile loop course. Choose between a standard run or tackle ultra marathon distances including the 50K and 50 mile events.

Granite Head Trails & Ales Trail Races feature 6.6-mile and 11.2-mile courses. Runners get a tech T-shirt and can enjoy post-race fajitas and a beer. The event is the final race in a local trail running series.

A roughly 12 mile loop from Mitchell Canyon to the Mount Diablo summit and back, with about 4,200 feet of elevation change. The course includes steep climbs via Eagle Peak and Bald Ridge and a five hour cutoff.

A multi-distance trail event at Lake Sonoma on October 17-18, 2026 offering 100 Mile, 50 Mile, marathon and 4-person relays on singletrack with substantial elevation and on-site camping.

A trail running event at Mount Diablo in Walnut Creek on October 17, 2026 offering 30K, Half Marathon, 10K and 5K courses on hilly trails where mud and creek crossings are possible.

A 5k cross country race run in two loops around Willow Hill Reservoir next to Folsom High School, part of the Pacific Association USATF Cross Country Grand Prix, with a $75 bonus for breaking an age group record.

Join the Vampire Run in Roseville for a timed 5K or a 1 mile walk to support the bleeding disorders community. Enjoy a festive atmosphere with costumes, carnival games, and medals for all runners.

A repeating loop endurance event at Beals Point, Granite Bay, where runners complete a 4.16 miles loop every hour until one person remains. A 12 hour Mini option offers the same format with a fixed time limit and on site aid.

A Last Person Standing Backyard Ultra at Beals Point, Granite Bay, featuring a 4.16 mile loop with 320 ft elevation gain. A Mini 12 hour event uses the same hourly loop with a fixed 12 hour limit.

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..