California
California Obstacle Race Calendar 2026-2027
Monthly updates for California
Get new running races (and updates) in your inbox every month.
Explore the best obstacle runs in California for 2026-2027! Our updated list features 22 exciting races across the region. Find your next race in California below and join the running community at these great events!
September 2026
A Stadion obstacle race at Angel Stadium of Anaheim on September 12, 2026, featuring a 5 km course with 20 obstacles plus a kids race and spectator options.
An outdoor mud obstacle run near Redding, CA, with a just-under 5 km course through fields, hills and creek crossings. The family-oriented event includes vendors, children's activities, food, drinks and event swag.
A timed 5K Adventure Challenge with obstacles and a Kid Family Fun Run at Westside Pavilion, Tuolumne, with headbands for all and a 5K finisher medal.
Two days of Spartan obstacle races at Lake Elsinore Raceway near Temecula, featuring Sprint and Super distances, kids races, Hurricane Heat options, and spectator access.
Monthly updates for California
Get new running races (and updates) in your inbox every month.
October 2026
SEB Mud Run in Castaic on October 3, 2026 features a chip timed 4 mile mud obstacle and a 1 mile kids fun run with showers and changing tents on site.
Annual mud run in San Bernardino with a 5K for individuals and teams and a 1K kids race on October 10, 2026.
Ruff Run California on 10/17/2026 in Phelan, CA presents a 20 acre obstacle course for people and their dogs with over 20 obstacles, 4K and 1K options, and an after party with music, games and vendors.
November 2026
A two day Spartan Trifecta at Santa Margarita Ranch offering trail obstacle races from a 5 km Sprint to a 50K Ultra through vineyards and nearby forest.
Obstacle course races across vineyard and forest terrain in Santa Margarita, CA with Sprint, Super, Beast, Ultra and kids races over a two day weekend.
January 2027
SoCal Spartan Trifecta Weekend at Lake Perris offers 5K, 10K, 21K and kids obstacle races on a flat, fast course in a mountain rimmed park.
March 2027
A family-friendly mud run 5K at Lake Elsinore Diamond Stadium on March 13, 2027 with obstacles, waist-deep mud pits, slides and a festival-style after party.
Tough Mudder Lake Elsinore on March 20, 2027 offers 5–15+ km obstacle courses at Lake Elsinore Raceway, plus Infinity laps, spectator village, and finisher rewards.
Tough Mudder at Lake Elsinore Raceway on March 20, 2027 offers 15 kilometers, 5 to 8 kilometers, Infinity laps, 20+ obstacles and finisher rewards.
April 2027
A two day obstacle race weekend at Modesto Reservoir Regional Park offering 5 km to 50 km distances with technical terrain and panoramic valley views.
Obstacle course races at Pala Fox Raceway on April 10 and 11, 2027, featuring a 5 km sprint with 20 obstacles, a 10 km super, kids races, and spectator access.
A 5K mud obstacle run at Hobb's Grove in Sanger CA on April 25 2027 with Adult and KIDZ Family waves; waivers and photo ID required for adults.
May 2027
Two day Spartan obstacle weekend at Big Bear Mountain Resort in May 2027 with Sprint, Super, Beast and kids races at about 8,200 ft altitude.
Mud Factor's Seriously Fun 5K mud and obstacle run returns to Mahon Ranch in Elk Grove on May 16, 2027, with adult and KIDZ family waves and required waivers for participants.