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 20 exciting races across the region. Find your next race in California below and join the running community at these great events!
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 days of obstacle racing at Santa Margarita Ranch with events from a 5 km Sprint to a 50 km Ultra through vineyards and Los Padres National Forest.
Obstacle course weekend at Santa Margarita Ranch, CA on Nov 7 and 8 2026 with Sprint 5 km, Super 10 km, Beast 21 km, Ultra 50 km and kids races.
Monthly updates for California
Get new running races (and updates) in your inbox every month.
January 2027
A weekend of Spartan obstacle races at Lake Perris with 5K, 10K, 21K and kids races on a flat, scenic course near Perris, California.
February 2027
A 5 km Spartan obstacle race with 20 obstacles at Dodger Stadium on February 20, 2027, plus kids races and spectator access in Los Angeles.
March 2027
Muddy Dash Irvine on March 6, 2027 at Oak Canyon Park is a family friendly 5K mud run with obstacles, mud pits, slides, and a post race party.
A family-friendly 5K mud run with obstacles, mud pits, slides, a pre-party and a post-race party at Lake Elsinore Diamond Stadium on March 13, 2027.
Obstacle course event at Lake Elsinore Raceway on March 20, 2027 offering 15K and 5K courses, Infinity laps, a Mudder Village festival, and finisher rewards.
Tough Mudder Los Angeles at Lake Elsinore Raceway on March 20, 2027 features 15K and 5K obstacle courses, Infinity laps, and spectator options.
April 2027
An obstacle course weekend at Modesto Reservoir Regional Park featuring Sprint, Super, Beast, Ultra and kids races across rugged NorCal terrain with Bay Area views.
Two days of Spartan obstacle races at Pala Fox Raceway including Sprint, Super, kids races and spectator access with mud pits rope climbs and a festival finish.
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
Obstacle course weekend at Big Bear Mountain Resort with Sprint, Super, Beast, kids races, high-elevation terrain and an opportunity to earn a Trifecta in one weekend.
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.
Obstacle course weekend at Toro Park near Salinas, CA with Sprint 5 km (20 obstacles), Super 10 km (25 obstacles), kids races and spectator access.
August 2027
Weekend obstacle race at Mahon Ranch, Elk Grove, featuring Sprint 5 km, Super 10 km, kids races, Hurricane Heat formats, and spectator access.
September 2027
Experience rugged trails and mud at Lake Elsinore Raceway with Spartan 5K, 10K, and Kids obstacle races set against Southern California’s largest natural freshwater lake.