Race date is December 6-7, 2025.
Registration for the 2025 Devil Dog Ultras opens on January 1 on UltraSignup. Click here to register.
The 100-miler is $275. The 100k is $230. The 50k is $115. The price will increase on March 1 ($295, $245, and $125) and on October 1 ($320, $265, and $140).
New for 2025: Devil Dog Dynasty Challenge
Why settle for just one distance when you can go the extra mile (literally) and get rewarded for your relentless grit? Welcome to the Devil Dog Dynasty Challenge — a loyalty program that rewards your fiery passion for running with gear as legendary as your legs. It's all about pushing limits, earning bragging rights, and showing the trails who's boss. Ready to unleash the beast?
Beast Mode Bound Run the 50K and then the 100K in consecutive years: Earn exclusive Devil Dog swag so awesome, your friends will demand to know where they can snag one. Hint: They can't. This gear isn’t for couch potatoes.
Hellhound Hustle Run the 100K and then the 100M in consecutive years: Level up your ultra game and claim a custom leather belt so tough and cool it could intimidate a mountain lion. It’s great for holding the sweet buckle.
Triple Threat Triumph Run the 50K, 100K and then the 100M in consecutive years: For the most relentless runners, it’s time to cement your legacy. Conquer all three distances over three years and earn a custom Devil Dog vest so rugged and stylish it’ll make your hydration pack jealous. It's the ultimate reward for your trail-blazing domination.
How It Works - Pick your starting distance, then climb the Devil Dog ranks year after year. Whether you’re doubling down on the madness or taking on the ultimate trifecta, the Devil Dog Dynasty Challenge is here to turn your hard miles into legendary memories.
More Registration Details
Entry is limited to a total of 300 runners, with a waitlist if the race fills. Registration closes November 28.
To register for the 100-miler, you must have completed a 50-mile race within the past two years. (This means we can find your name on an official finisher list on a race website.) There is no entry requirement for 100k, but don’t be a dummy—if you’ve never run an ultra before, this is probably not the best starting point.
We’re no longer able to offer refunds. If you find yourself unable to run, you can transfer your bib to another person. The new runner must have completed a qualifying race, and bibs cannot be transferred to a different race distance. (For example, if you signed up for the 100K, the runner taking your place must also do the 100K.) There will be a $20 fee for the new runner, and we will handle the transfer in Ultrasignup. You will be responsible for funding and collecting your entry asking price from the new runner. Bib transfers must be completed by Nov. 7.
For to transfer your bib, please email the race director here.
Race swag will be announced on the Marine Corps’ birthday, Nov. 10.
In the event that inclement weather, or another situation forces the cancellation of the race, the race director has full discretion on how to handle any refunds or deferrals.