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
Spartan Stadion at Angel Stadium on Sep 12, 2026 features a 5 km course with 20 obstacles plus a kids race and spectator access.
Navigate through mud and over obstacles in this family friendly 5k course featuring creek crossings and hills at the historic Nash Ranch.
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.
Obstacle course weekend at Lake Elsinore Raceway featuring Sprint 5K, Super 10K, kids races, and Hurricane Heat formats on September 26 to 27, 2026.
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
Two day Spartan obstacle weekend at Santa Margarita Ranch with races from a kids 1 to 3 km course up to a 50K Ultra through vineyards and 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.
An obstacle and mud focused 5K at Oak Canyon Park on Nov 21, 2026, featuring a course with mud pits and obstacles, pre race and finish festivals, and Value and VIP registration options.
January 2027
Obstacle course weekend at Lake Perris with 5 km, 10 km, 21 km and kids races on January 23 and 24, 2027.
March 2027
Family friendly 5K mud run at Lake Elsinore Diamond Stadium on March 13, 2027 with mud pits, obstacles, slides and a Pre 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
Two-day Spartan Trifecta Weekend at Modesto Reservoir Regional Park on Apr 3 and 4, 2027 featuring 5K, 10K, 21K, 50K obstacle races plus kids events.
A weekend of obstacle course races at Pala Fox Raceway with Sprint, Super and kids events plus spectator access on Apr 10 to 11, 2027.
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
High-altitude Spartan weekend at Big Bear Mountain Resort with Sprint, Super, Beast and kids obstacle races plus a Trifecta option.
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.