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!
August 2026
Operation YOSEMITE 2026 is an in-person trail event in Mono County, California on August 8, 2026, offering four distances from 6 to 22 miles with a 20 lb dry load and specified elevation gains.
Two day 5K mud run in Moorpark, CA on August 15 and 16, 2026. The course includes 15 major obstacles, deep mud pits and rolling hills, with rinse stations and a Basecamp area featuring food trucks and music.
NorCal Spartan Event Weekend at Mahon Ranch in Elk Grove features Sprint, Super and Kids obstacle races on rolling trails and river crossings, with spectator options and team registration available.
September 2026
Tough Mudder Big Bear on September 12, 2026 at Bear Mountain features 5K and 10K obstacle courses at high altitude, named obstacles, finisher medals and apparel, spectator passes, and options for volunteers and group packages.
A Stadion 5 km obstacle race at Angel Stadium of Anaheim on September 12, 2026, featuring 20 obstacles, a kids race and spectator access inside the ballpark. Ticketed entries and race day services are listed for participants and visitors.
A family-friendly mud obstacle run at Nash Ranch Pumpkin Patch in Redding on September 12, 2026, featuring mud and water challenges across ranch terrain. Organized by the Active 20-30 Club of Redding to support local children’s programs.
A Spartan obstacle weekend at Lake Elsinore Raceway featuring Sprint 5K, Super 10K, kids races and Hurricane Heat formats. Expect rugged trails, mud, varied terrain and onsite spectator options.
October 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 multi-distance Spartan weekend at Santa Margarita Ranch featuring trail and vineyard terrain, obstacle counts for each race from 5K to 50K, a kids race, workshop, and spectator access.
Central California Spartan Trifecta Weekend at Santa Margarita Ranch on Nov 7 to 8 2026 offers obstacle races from a 5 km Sprint to a 50 km Ultra set among vineyards and the Los Padres National Forest. Spectator access and an obstacle workshop are in..
Terrain Race Irvine is an obstacle and mud focused 5K at Oak Canyon Park on November 21, 2026, featuring mud pits, walls, ropes and 11+ obstacles, plus pre race packet pickup and a post race festival with food, music and vendor booths.
January 2027
A Spartan Race weekend at Lake Perris State Recreation Area on Jan 23 and 24, 2027 features 5K, 10K and 21K obstacle races plus a kids race. The course is described as flat and fast with lakeside views and park facilities.
March 2027
Tough Mudder Los Angeles on March 20, 2027 at Lake Elsinore Raceway is a mud obstacle event over scrubland and motor-cross terrain. Race options include 15 plus km, 5 to 8 km, Infinity laps, spectator access, and group packages.
An outdoor obstacle event at Lake Elsinore Raceway on March 20, 2027, offering multiple distances including 5 to 8 km and 15 plus km, Infinity laps, named obstacles, finisher medal, shirt, headband, and a finisher drink.
April 2027
A two day Spartan obstacle race weekend at Modesto Reservoir Regional Park offering Sprint, Super, Beast and Ultra distances plus a kids race and spectator access.
San Diego Spartan Event Weekend at Pala Fox Raceway offers obstacle course racing with a 5 km Sprint featuring 20 obstacles and a 10 km Super with 25 obstacles, plus kids races and spectator options.
Mud Factor FRESNO is an annual 5K obstacle mud run at Hobb's Grove in Sanger, CA on April 25, 2027, with Adult and KIDZ Family waves; waivers and photo ID are required and spectators pay a $10 cash fee for festival-area access.
May 2027
A two-day Spartan weekend at Big Bear Mountain Resort featuring Sprint, Super and Beast obstacle races at high altitude, plus a kids race and spectator options. The layout includes long climbs and descents and a Trifecta opportunity.
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 weekend of Spartan obstacle races at Toro Park near Salinas with Sprint, Super and kids distances on wooded, hilly trails. Team entries, volunteer options, spectator access, and a service member discount are available.