California Mud Run & Obstacle Race Calendar 2025-2026

Mud Factor - Fresno is an exciting annual 5K mud run taking place at Hobb's Grove in Sanger, California. This family-friendly event features both adult and KIDZ family waves, making it accessible for participants of all ages. The course includes various obstacles designed to challenge and entertain runners as they navigate through mud and fun.

Participants are required to sign a waiver and bring a photo ID for registration. Spectators can enjoy the festival area for a small fee. Join the fun and experience a day filled with adventure and camaraderie at this unique mud run event!. Visit the organization's website for the most recent information.

The 2025 NorCal DEKA FIT & Ultra event will take place at the Safe Credit Union Convention Center in Sacramento, California, over two days of dynamic fitness challenges. Participants can engage in the DEKA FIT, a 5 km race featuring 10 fitness zones, or the more intense DEKA FIT Ultra. This event is designed for all fitness levels, promoting endurance, strength, and mental toughness. Additionally, the DEKA Athlete Judge Program will be implemented to ensure a professionally judged experience for all athletes. Finishers will receive awards, and there are opportunities for volunteers to earn race credits. Visit the organization's website for the most recent information.

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, taking place at Toro Park, features a variety of obstacle course races, including a Sprint 5K with 20 obstacles, a Super 10K with 25 obstacles, and a Kids Race ranging from 1 to 3 km. Set against the stunning backdrop of California's rolling hills and picturesque woods, this event promises a challenging experience for participants of all ages. The weekend also offers a Trifecta Pass for those looking to tackle all three distances. With its scenic views and demanding courses, the Monterey Spartan Event is a favorite among racing enthusiasts. 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.

Tough Mudder Big Bear is an exhilarating obstacle course event taking place from September 5 to 7, 2025, in Big Bear, California. Participants can choose between a 5K course featuring over 12 obstacles or a challenging 10K course with 20 obstacles, all designed to test teamwork and endurance. The event is co-hosted with In-N-Out Burger, offering a unique experience that includes a finisher meal of their iconic Double-Double®. Proceeds benefit the Slave 2 Nothing Foundation, which focuses on combating substance abuse and human trafficking. The event promises a festive atmosphere with a Mudder Village Festival, making it a memorable experience 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.

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, taking place in Mammoth Lakes, California, is set to be an exhilarating event on October 4-5, 2025. This inaugural 10K Super World Championship challenges participants with high-altitude terrain and a variety of obstacles, including a Sprint, Super, and Beast race. Competitors can also engage in a Kids Race, making it a family-friendly event. Participants will have the chance to earn exclusive championship swag while pushing their limits in a stunning mountain setting. The weekend promises a mix of grit, glory, and unforgettable experiences for all athletes. 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 SoCal Spartan Event Weekend, taking place at Lake Perris State Recreation Area, offers a thrilling experience for participants of all ages and skill levels. Scheduled for January 24-25, 2026, the event features various race distances, including a 5K Sprint with 20 obstacles, a 10K Super with 25 obstacles, and a challenging 21K Beast with 30 obstacles. Additionally, there is a Kids Race ranging from 1-3 km, designed to engage younger participants. Set against a scenic backdrop, this event promises an unforgettable physical challenge amidst the beautiful Southern California wilderness. 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.