Trail Running calendar near El Dorado Hills 2026-2027

Trail races in Auburn and Cool, CA in March 2027 on sections of the Western States trail with 5K, 10K, half marathon, and 35K distances.

Obstacle course weekend with races from 5 km to 50 km, held April 3 and 4 2027 at Modesto Reservoir Regional Park near Waterford CA.

Trail event in Walnut Creek on April 3, 2027 offering 50K, half marathon, 10K and 5K options with part of fees supporting Save Mount Diablo.

A women's only 10K in Auburn on April 17, 2027 that follows scenic trail loops with aid stations and age-group awards; the overall winner and four additional finishers will be selected to receive all-expenses-paid trips to a women's running..

Outlands is a two day endurance event in Pilot Hill, California on April 17 and 18 2027, featuring 25K, 50K and 50M trail runs plus a 50K mountain bike course over single track and double wide trails.

Auburn trail races from 25 km to 100 miles that share sections of the Western States Trail and qualify runners for UTMB World Series and Western States.

A new backyard ultra near Pacerville, California runs a 4.167 mile loop each hour until one runner remains. The weekend combines a community campout, a kids race, on-site crew areas, and net proceeds to local nonprofits.

A timed half marathon through eight Napa Valley wine estates finishing in Yountville. The event includes a finish line Wine Village with live music and complimentary wine tastings.

May 15, 2027 trail races at Skyline Wilderness Park in Napa offer 10K, 21K, 30K and 50K courses with substantial elevation gain and staffed aid stations. This is a cupless event so runners must carry their own hydration.

A trail ultramarathon in Napa Valley centered at Skyline Wilderness Park, offering a solo 50 mile course and a one-loop 25 mile option. Cupless aid stations, on-course fueling, limited crew access, and drop bag support.

Mud Factor Sacramento is a 5K mud and obstacle run at the 300 acre Mahon Ranch in Elk Grove on May 16, 2027, with adult and Kidz family waves, advertised entry fees from $27, and a $10 cash spectator fee for festival access.

A paved out-and-back along the Truckee River Trail in Olympic Valley with Half Marathon, 8 Miler, and 5K options, aid stations, finisher medals, event shirts, and beer for those 21 and older.

A 200.4 mile loop ultramarathon around Lake Tahoe on single-track trails with 32,093 feet of elevation gain and staffed aid and sleep stations.

The Run Fast or Pretend Like You Are 100 Mile Relay will take place in Auburn on Thursday 24 June 2027.

The Iron X will take place in Auburn on Saturday 10 July 2027. You can run 21 kilometers.