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 21 exciting races across the region. Find your next race in California below and join the running community at these great events!
August 2026
NorCal Spartan Event Weekend at Mahon Ranch features a Super 10K, a Sprint 5K, kids races across two days, and spectator access in Elk Grove, California.
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.
Inaugural Black Oak Challenge in Tuolumne features a timed 5K obstacle course plus a kids fun run, with headbands for all and finisher medals for 5K completers.
Monthly updates for California
Get new running races (and updates) in your inbox every month.
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.
October 2026
An obstacle course mud event in Castaic with a chip timed 4 mile and a 1 mile kids fun run, plus on site showers and changing tents.
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.
A multi-day obstacle race weekend at Santa Margarita Ranch with Sprint, Super, Beast, Ultra and kids races through vineyards and forested hills.
An obstacle and mud-focused 5K at Oak Canyon Park in Irvine on Nov 21, 2026, featuring a festival area, packet pickup, and Value and VIP registration options.
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
Obstacle event at Lake Elsinore Raceway on March 20, 2027 with 5 to 15+ km options, Infinity laps, 12+ to 20+ obstacles, and finisher medal, shirt, and headband.
An obstacle event at Lake Elsinore Raceway on March 20, 2027 offering 5 to 15 kilometer options, multiple obstacles, an Infinity lap option and a Mudder Village for spectators.
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.