California Mud Run & Obstacle Race Calendar 2025-2026

The Big Bear Spartan Trifecta Weekend, scheduled for May 17-18, 2025, at Big Bear Mountain Resort, offers a challenging series of obstacle course races set against a stunning mountainous backdrop. Participants can choose from various race distances, including a 5K Sprint with 20 obstacles, a 10K Super with 25 obstacles, and a 21K Beast featuring 30 obstacles. Additionally, there is a Kids Race for younger participants. The event promises significant elevation gains, making it a memorable experience for athletes. Beyond the races, attendees can enjoy local culture, food, and entertainment in Southern California. Visit the organization's website for the most recent information.

The Monterey Spartan Event Weekend takes place at scenic Toro Park near Salinas, California, offering a challenging obstacle course experience amid picturesque woods and rolling hills. The event features multiple race distances including a 5K Sprint with 20 obstacles, a 10K Super with 25 obstacles, and a kids' race ranging from 1 to 3 kilometers with obstacles. Participants face rugged trails, steep climbs, and open field sprints, all set against beautiful coastal California scenery. The weekend also includes Spartan Trail Races and offers a Trifecta Pass to compete in all three distances. The event encourages team participation and provides discounts for service members. Visit the organization's website for the most recent information.

The NorCal Spartan Event Weekend, taking place at Mahon Ranch in Elk Grove, CA, promises an exhilarating experience for participants of all ages and skill levels. Scheduled for August 23-24, 2025, the event features a variety of races, including a 5K Sprint with 20 obstacles, a 10K Super with 25 obstacles, and a Kids Race ranging from 1-3 km. Additionally, participants can challenge themselves with a 12-hour Hurricane Heat and a 4-hour version. This weekend is designed to foster competition, camaraderie, and resilience amidst beautiful scenic landscapes, making it an unforgettable adventure for all. Visit the organization's website for the most recent information.

The In-N-Out Tough Mudder Challenge is a mud-filled obstacle course held at Bear Mountain Resort in Big Bear Lake, California, from September 5-7, 2025. Participants can choose between a 5K or 10K race, featuring over 12 to 20 obstacles designed to test endurance, strength, and teamwork. The event benefits the Slave 2 Nothing Foundation, supporting efforts against substance abuse and human trafficking. Attendees can register as individuals or teams, with options for spectators and VIP viewing. The event includes finisher rewards, food, and opportunities for fundraising, all aimed at promoting community support and awareness for important social causes. Visit the organization's website for the most recent information.

Tough Mudder Big Bear, held at Bear Mountain in Big Bear Lake, California, is a challenging obstacle course event featuring customized 5K and 10K courses with 12+ and 20 obstacles respectively. The event emphasizes teamwork and offers epic mountain views, a secret obstacle menu, and exclusive co-branded swag. Participants earn unique finisher medals, shirts, and headbands, plus a celebratory Double-Double® meal from In-N-Out Burger at the Mudder Village Festival. Proceeds support the Slave 2 Nothing® Foundation, combating substance abuse and human trafficking. The event also offers spectator passes, VIP experiences, group packages, and volunteer opportunities, creating a vibrant and supportive atmosphere for all. Visit the organization's website for the most recent information.

The Angel Stadium Spartan Stadion Weekend is an exciting obstacle course race taking place at the iconic Angel Stadium in Anaheim, California. Participants can challenge themselves with a 5K course featuring 20 obstacles, designed to test their strength and endurance. There is also a Kids Race, offering younger participants a chance to engage in a fun 1-1.5 km course with obstacles. This event not only provides a thrilling athletic experience but also allows racers to enjoy the historic ballpark setting. After the race, attendees can relax at nearby Laguna Beach, making it a perfect weekend for families and fitness enthusiasts alike. Visit the organization's website for the most recent information.

The Temecula Spartan Event Weekend, held at Lake Elsinore Raceway in California from September 26-28, 2025, offers a variety of obstacle course races set against scenic lakeside views. Participants can challenge themselves in the Sprint 5K with 20 obstacles, the Super 10K with 25 obstacles, or enjoy a Kids Race. Additional events include Hurricane Heat endurance challenges lasting 4, 12, or 24 hours. The course features rugged terrain, open trails, and challenging obstacles, providing an exciting adventure for both beginners and seasoned athletes. The event promotes team racing, family fun, and offers exclusive hotel discounts for participants. Visit the organization's website for the most recent information.

The Mammoth Spartan Super World Championship Weekend, held at Mammoth Mountain Ski Area in California, is a premier obstacle course racing event set in the high-altitude Sierra Nevada Mountains at 7,900 feet. The event features multiple race distances including a 5K Sprint with 20 obstacles, a 10K Super with 25 obstacles, and a 21K Beast with 30 obstacles, alongside kids' races. This inaugural 10K Super World Championship challenges participants with rugged terrain and demanding obstacles, promising an intense test of mind and body. The vibrant Mammoth Lakes village offers excellent accommodations and activities, making it a thrilling weekend for racers and spectators alike. Visit the organization's website for the most recent information.

Ruff Run California 2025 is an exciting annual obstacle run taking place in Phelan, California, designed for participants and their dogs. The event features over 20 obstacles that challenge both physical endurance and teamwork between participants and their pups. The course includes a 4ishK run filled with mud, water, and strategic challenges, making it a fun and engaging experience. This year, participants will receive custom jerseys to commemorate the event. The day will also include an after-party with music, games, and vendors, set against the beautiful backdrop of the high desert at 4200 feet above sea level. Visit the organization's website for the most recent information.

The Boot Camp Challenge is a 3-mile obstacle run held at Marine Corps Recruit Depot San Diego, featuring over 60 Marine Drill Instructors motivating participants along the course. The event offers a fun, challenging experience for all fitness levels, with obstacles similar to those faced by Marines in training. Runners can compete individually or in three-person teams, with awards for top finishers in various age and team categories.

The race includes a post-race celebration with music, displays, and demonstrations. Proceeds benefit Marine Corps Community Services, supporting Marines and their families. The event is open to the public and free for spectators. Visit the organization's website for the most recent information.

The SLO CAL Spartan Trifecta Weekend takes place at Santa Margarita Ranch in Central California, nestled among scenic vineyards and the Los Padres National Forest. This challenging obstacle course event offers multiple race distances, including a 5K Sprint with 20 obstacles, a 10K Super with 25 obstacles, a 21K Beast featuring 30 obstacles, and a demanding 50K Ultra with 60 obstacles. Participants race through rugged trails with views of wildlife and unique natural features like a fossilized oyster bed. The event welcomes all levels, from first-time racers to seasoned athletes, and includes a kids' race for family fun. The weekend atmosphere combines endurance, nature, and community spirit. Visit the organization's website for the most recent information.

The SoCal Spartan Event Weekend, held at Lake Perris State Recreation Area in Perris, California, offers a challenging obstacle course race experience with scenic mountain views. Participants can choose from Sprint (5K, 20 obstacles), Super (10K, 25 obstacles), Beast (21K, 30 obstacles), and Kids Race (1-3K with obstacles). The course is described as flat and fast but demanding, set in a well-maintained park with camping facilities. Located about 40 minutes south of San Bernardino, this event is ideal for individuals and teams seeking a physical and mental challenge in a vibrant, outdoor atmosphere. The weekend also encourages team participation and offers discounts for service members. Visit the organization's website for the most recent information.

The San Jose Spartan Trifecta Weekend, taking place at Woodward Reservoir Regional Park, offers a thrilling experience for obstacle course racing enthusiasts. Participants can choose from various race distances, including the Sprint (5K with 20 obstacles), Super (10K with 25 obstacles), Beast (21K with 30 obstacles), and Ultra (50K with 60 obstacles), along with a Kids Race. The event is designed to challenge both mind and body, set against a scenic backdrop of over 3,700 acres of land. This weekend promises camaraderie, competition, and the chance to achieve personal bests in a supportive environment. Visit the organization's website for the most recent information.