Trail Running calendar near Fairfield 2025-2026

The 27th Annual Matt Yeo Memorial Aggie XC Open, presented by the HOKA Aggies, is held at Radke Martinez Regional Shoreline in Martinez, California. The meet features three 4.1-mile cross-country races for Women, Masters Men, and Open Men,..

Join the Quicksilver Trail Challenge at Almaden Quicksilver County Park in San Jose on Oct 25, 2025. Pick a scenic half marathon, 10K, or free kids one mile and explore single track trails with sweeping Mt Umunhum views.

Event overview The Haunted Hills 5K & 10K is a Halloween-themed walking and running event in Redwood City, CA, on October 25, 2025. It is organized as a trick-or-treat style course for adults and families. Participants form teams of 1 t..

Event details The 2025 Napa Fall Wine Country race is the 33rd annual trail event at Bothe-Napa Valley State Park in Saint Helena, California. It is scheduled for October 25, 2025 and is limited to 300 participants. Distances offered: Mara..

Wise Villa Fall Harvest Run is a 5k chip-timed race/walk staged at Wise Villa Winery in Lincoln, California. The two-loop course starts and finishes at the winery, winding through the property with spectacular views; the route is described..

Join the Oakland Hills Trail Run on October 25 2025 at Redwood Regional Park with 35K, half marathon or 10K options on scenic technical trails. Limited to 300 runners, finishers earn a custom medal and enjoy well stocked aid stations.

Take on Rio Del Lago on November 1, 2025 at Beal's Point in Folsom Lake, with 100 mile and 50K options across scenic Sierra foothills. The 100 mile is a 2026 Western States qualifier and rewards finishers with memorable swag and epic views.

Event details The Almaden Hills Trail Run - Fall takes place on November 1, 2025 in San Jose, California. The event is based at Almaden Quicksilver Park in the Almaden Valley area, with a listed location of 19535 Mockingbird Hill Lane. Regi..

The 39th Golden Gate Park XC Open, held at Lindley Meadow (30th Ave & JFK Dr) in San Francisco's Golden Gate Park, is a 5k cross-country race over grass, dirt, and rolling hills. It features Masters Women 40+ and Masters Men 40+ along with..

Run into Halloween at Hellyer County Park in San Jose featuring distances from a 50 yard kids dash to 5K, 10K, Half Marathon and Marathon. Certified courses, costumes, finisher medals and stocked aid stations make it a fun challenge for all..

Run through towering redwoods at the Oakland Tech 5 km fundraiser, with a 1 mile fun run or walk for all levels. Enjoy scenic trails while supporting Oakland Tech PTSA and the school cross country team.

NorCal Backyard Ultra : November 7-10, 2025, Beals Point (Granite Bay, CA) The NorCal Backyard Ultra returns for its third edition at Folsom Lake’s Beals Point in Granite Bay, California. The event features two linked formats: Last Person S..

Enjoy scenic redwood trails at Huddart Park with distances from 3 Mile to Half Marathon, plus a family Mermaid Dash for kids. Try the festive 6 Hour Challenge to see how many 3 Mile loops you can cover, or join virtually.

Explore scenic trails around Lake Chabot Marina in Castro Valley with distances from 8K to 50K and a kids dash for little runners. Pre registered runners get T shirts and all finishers receive custom medals and stocked aid stations.

Run scenic, rugged trails from Stinson Beach up to Mt Tamalpais with options from 10K to 50K, big climbs, technical singletrack and sweeping coastal views. Friendly aid stations and chip timing make this a classic Bay Area trail challenge.

The Ripon Turkey Trail Run is a community-focused running event held in Ripon, California, at Mavis Stouffer Park along the Stanislaus River Trail. Scheduled for November 15, 2025, the race offers three distance options: 5K, 10K, and a half..

Take on scenic, technical trails at Falcon Crest in El Dorado Hills on November 15, 2025, with distances from 5K to a full trail marathon. Rolling hills, creek crossings, and commemorative medals make this a must for trail lovers.

Darrington Single Track Trail Challenge : Nov 22, 2025 The Darrington Single Track Trail Challenge is a trail running event in the Pilot Hill, California area on November 22, 2025. The event offers multiple distance options: 36 Miler 18 Mi..

Test your endurance at The Captain’s Runaround in Riverbank on November 22, 2025, a timed loop race where you log as many miles as possible. Pick 8, 6, 4 or the new 2 hour sessions on a just under one mile loop at Jacob Myers Community Park..

Cross the iconic Golden Gate Bridge and run into the wild Marin Headlands at the Golden Gate Trail Classic. Distances from 15K to 50 Mile serve up coastal views, rugged trails and a memorable challenge for trail runners of every level.