Fairfield
Trail Running Calendar near Fairfield 2026-2027
Explore the top trail runs near Fairfield for 2026-2027! We've gathered 18 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
October 2026
A three-day event in San Rafael featuring an Olympic triathlon, Olympic relay, trail half marathon, a combined challenge and a kids fun race.
Monthly community hike with an optional trail run in Richmond, CA, organized by FIERCE Advocates with Moving Forward and Richmond Run Club; free parking and open to all ages.
A 12.4 mile loop from Mitchell Canyon to the Mount Diablo summit and back, with about 4,000 feet of elevation change, a 5 hour cutoff, and shuttle service.
Trail races on Mount Diablo in Walnut Creek on October 17, 2026 offering 30K, half marathon, 10K and 5K on hilly trails with possible mud and creek crossings.
Cross-country meet at Radke Martinez Regional Shoreline on October 24, 2026, with three approximately 4.1 mile races over grass, dirt, and path surfaces.
November 2026
The 40th annual Annadel Loop is a 6.45 mile trail race in Annadel State Park with staggered starts, awards for the top 13, a limited field, and published member and non member fees.
April 2027
Trail running event in Walnut Creek on April 3, 2027 offering 50K, Half Marathon, 10K and 5K with a portion of entry fees benefiting Save Mount Diablo.
Trail races at Jack London State Historic Park on April 17, 2027, offering a half marathon, 5.5 mile and 5K across vineyard views and Sonoma Mountain slopes.
May 2027
Scenic timed half marathon through Napa vineyards from Quintessa Winery to Yountville, featuring winery aid stations, a Finish Line Wine Village with tastings, shuttle service and a finisher medal.
Trail runs at Skyline Wilderness Park in Napa on May 15, 2027 with 10K, 21K, 30K, and 50K courses, aid stations, and a strict cupless policy.
A race day in El Sobrante with a half marathon, 10K, 5K and a hiker division through the hills of Wilcat Canyon; registration windows and fees vary by distance.
June 2027
Experience a 100 mile point to point journey through the East Bay with 18,000 feet of vertical gain and breathtaking views from the Golden Gate to Mt. Diablo.