California Mud Run & Obstacle Race Calendar 2025-2026

The NorCal Spartan Event Weekend takes place at Mahon Ranch in Elk Grove, California, near Sacramento. This challenging obstacle course race weekend features multiple events including a 5K Sprint with 20 obstacles, a 10K Super with 25 obstacles, and kids' races ranging from 1 to 3 kilometers with obstacles. Participants will experience scenic landscapes, rivers, and rolling trails designed to test all levels of athletes, from beginners to elites. Additional events include the Hurricane Heat endurance challenges and a Trifecta Pass for those who want to race all three distances. The event promotes camaraderie, resilience, and team participation with special discounts for service members. Visit the organization's website for the most recent information.

The In-N-Out Burger Tough Mudder Challenge is a dynamic obstacle course event held at Bear Mountain Resort in Big Bear Lake, California. Scheduled for September 5–7, 2025, it features two main race distances: a 10K with over 20 obstacles and a 5K with more than 12 obstacles, designed to test endurance, grit, and teamwork. The event supports the Slave 2 Nothing Foundation, which combats substance abuse and human trafficking. Participants enjoy a festive atmosphere with a Mudder Village Festival and receive finisher rewards including a meal from In-N-Out’s Cookout Trucks, a medal, shirt, and headband. Spectator passes and VIP options are also available. Visit the organization's website for the most recent information.

Tough Mudder Big Bear 2025, held at Bear Mountain in Big Bear Lake, California, offers a challenging and scenic obstacle course experience. Participants can choose between a 5K course with 12+ obstacles or a 10K course featuring 20 obstacles, designed to test teamwork and endurance. The event is uniquely partnered with In-N-Out Burger, providing exclusive co-branded swag and a finisher Double-Double® meal from onsite cookout trucks. Proceeds support the Slave 2 Nothing® Foundation, combating substance abuse and human trafficking. The event also features a festive Mudder Village with live entertainment, spectator access, and VIP group packages, making it a memorable weekend of fitness and camaraderie. Visit the organization's website for the most recent information.

The Nash Ranch Mud Run, held in Redding, California, is a family-friendly 5K obstacle race featuring mud, creek crossings, hills, and various structures to climb over and crawl under. Organized by the Active 20-30 Club of Redding, the event offers a fun atmosphere with vendors, children's activities, food, and drinks. Participants receive Mud Run swag and can expect a challenging yet enjoyable course through fields and natural terrain. The event supports a local nonprofit focused on young professionals improving the lives of children with special needs. The race promotes community involvement and personal growth while providing an exciting outdoor experience. Visit the organization's website for the most recent information.

The Angel Stadium Spartan Stadion Weekend, held at the iconic Angel Stadium of Anaheim in Orange County, California, features a thrilling 5K obstacle course with 20 challenging obstacles. Participants race through the historic ballpark, navigating bleachers and various physical challenges that test endurance and agility. The event also offers a kids' race of 1 to 1.5 kilometers with obstacles, making it family-friendly. Racers can enjoy the vibrant atmosphere of the stadium and explore nearby attractions like Laguna Beach after the race. The event encourages team participation and offers discounts for service members, creating an inclusive and exciting Spartan race experience. Visit the organization's website for the most recent information.

The Temecula Spartan Event Weekend, held at Lake Elsinore Raceway in California, offers a scenic and challenging obstacle course experience along the shores of Lake Elsinore. Participants can choose from a Sprint 5K with 20 obstacles, a Super 10K featuring 25 obstacles, and kids' races ranging from 1 to 3 kilometers with obstacles. The course showcases rugged trails, rolling terrain, and stunning water views under mild Southern California September weather. Additional challenges include Hurricane Heat endurance events lasting 4, 12, or 24 hours. This event is ideal for all skill levels seeking a thrilling outdoor adventure with team options and family-friendly activities. Visit the organization's website for the most recent information.

The Mammoth Spartan Trifecta Weekend, held in Mammoth Lakes, California, offers a challenging obstacle course race set at a high altitude of 7,900 feet in the Sierra Nevada Mountains. Participants can compete in three race distances: Sprint (5K with 20 obstacles), Super (10K with 25 obstacles), and Beast (21K with 30 obstacles), plus a kids' race. The event features a mix of rugged terrain and demanding obstacles designed to test endurance and grit. Alongside the races, the weekend includes the inaugural Spartan Super World Championship and a vibrant après-race atmosphere in Mammoth Lakes’ lively village, known for its hotels, dining, and outdoor activities. 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 race set at a challenging high altitude of 7,900 feet in the Sierra Nevada Mountains. The highlight is the inaugural 10K Super World Championship featuring 25 obstacles over a rugged 10-kilometer course designed to test endurance and grit. Participants can also compete in Sprint, Super, or Beast races during this action-packed Trifecta weekend. The event offers a vibrant atmosphere with access to Mammoth Lakes’ lively village, including top hotels, restaurants, and outdoor activities, making it an exciting and demanding experience for individual racers and teams alike. Visit the organization's website for the most recent information.

The Boot Camp Challenge is a 3-mile obstacle race held at the Marine Corps Recruit Depot (MCRD) in San Diego, one of only two locations where Marine Corps boot camp occurs. Open to the public for one day annually, the course features obstacles similar to those faced by Marine recruits, with encouragement from over 60 Marine Corps Drill Instructors. Designed for all fitness levels, participants can skip obstacles without penalty.

The event celebrates the 250th anniversary of the U.S. Marine Corps and offers unique prizes, including a Harley-Davidson motorcycle. Spectators enjoy free admission, entertainment, and Marine Corps cultural displays. Visit the organization's website for the most recent information.

Ruff Run California is an annual obstacle run held in Phelan, CA, set in the scenic high desert at 4,200 feet elevation. The event features a 4ishK course with over 20 obstacles that challenge participants and their dogs, testing training, teamwork, and strategy through mud, water, and mental challenges. The 2025 race includes a new course section and custom jerseys for all participants. Besides the competitive 4k wave, there are also a 4ishK fun run and a 1k fun walk/run. The event fosters a lively atmosphere with an after-party featuring music, games, and vendors, making it a fun day for both runners and their pups. 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, set amidst 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 rolling wine country hills, grapevine rows, and open valleys, enjoying views of wildlife and unique natural features like a fossilized oyster bed. The event welcomes racers of all levels, including kids, and provides a vibrant, supportive atmosphere under sunny skies. 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 multiple race distances: the Sprint (5K with 20 obstacles), Super (10K with 25 obstacles), Beast (21K with 30 obstacles), and a 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. The event fosters a competitive yet fun atmosphere suitable for individuals, teams, and families, making it a memorable physical challenge in Southern California’s rugged wilderness. Visit the organization's website for the most recent information.

The San Jose Spartan Trifecta Weekend, held at Woodward Reservoir Regional Park near Oakdale, CA, offers a challenging obstacle course experience across a scenic 3,700-acre venue with a 2,900-acre reservoir. Participants can choose from multiple race distances: the Sprint (5K with 20 obstacles), Super (10K with 25 obstacles), Beast (21K with 30 obstacles), and the Ultra (50K with 60 obstacles), plus a kids' race featuring 1-3 km with obstacles. The flat course is designed to help racers push their personal best times in a supportive, team-friendly atmosphere. The event also provides discounts for service members and encourages team participation for shared start times and savings. Visit the organization's website for the most recent information.

The Big Bear Spartan Trifecta Weekend, held at Big Bear Mountain Resort in California, is a challenging obstacle course event set at a high altitude of 8,200 feet. Participants face steep climbs and descents over 1,200 feet, testing endurance and strength across three race distances: the 5K Sprint with 20 obstacles, the 10K Super with 25 obstacles, and the 21K Beast featuring 30 obstacles. This extreme course offers expansive Southern California views and the chance to earn a Trifecta by completing all three races in one weekend. The event also includes a kids' race and promotes team participation, with amenities like bag check and parking included. Visit the organization's website for the most recent information.

The Monterey Spartan Event Weekend, held at scenic Toro Park near Salinas, California, offers challenging obstacle course races set against picturesque coastal landscapes. Participants can choose from a 5K Sprint featuring 20 obstacles or a 10K Super with 25 obstacles, both incorporating rugged trails, steep climbs, and open field sprints. The course is renowned for its demanding terrain and stunning views of rolling hills and ocean vistas, making it a favorite among racers. The event also includes kids' races and Spartan Trail Races, providing a family-friendly atmosphere. Amenities include bag check, parking, and all fees included in ticket prices, enhancing the overall race experience. Visit the organization's website for the most recent information.