February 8 - 9, 2019

Grandmaster Ultras

Littlefield, AZ 100 Miler, 100K, 48hrs, 50 Miler, 50K, 20 Miler, 1/2 Marathon, 10K

Registration closes: Wed, Feb 6 @ 11:59PM

Event starts in

Welcome Grandmaster Runners!

Welcome to the warm and sunny Arizona strip! Come and enjoy miles of ATV trails and beautiful scenery in the desert.

100 miles and 100k have 48 hours cutoff, but if you have option to start on Saturday to have 24 hours to finish your race, 50 mile runners also can choose to start on Friday, so you can have 48 hours to finish, just need to answer the start date question when you register.

Pacers are allowed for 100 miles, 100k and 50 miles after first lap of 25 miles or 31 miles for 100k. For any runners over 70 years old, pacers are allowed from the start.

Course description (Updated)

The course is 25 miles loop with elevation gain of 1235 feet, minimum elevation is at 1800 feet, max at 2500 feet. 7 miles on rough country road, and 18 miles on ATV trails. 50 mile runners will do 2 laps, 100 mile runners will run it 4 times.

50k runners will follow the same route to mile 21 aid station, then turn around, run 2.3 mile, turn left at the intersection, run 0.5 mile to dirt road, turn left back to aid station at mile 10.5, tri state monument sign, then turn left, run 1 mile back to mile 21 aid station, follow the main route heading to finish, 100k runners will run 50k route twice.

Half marathon runners will follow the main loop to mile 10.5, then take the dirt road to finish, it has about 980 feet gain. 10k course is 3+ miles out and back on dirt road, it has about 300 feet gain.

Click this link for 25 mile loop route map and elevation profile.

We will have aid stations every 5 or 6 miles.

48 Hour Challenge

48 hour Challenge: this won't be a traditional timed event on 1 or 2 mile lap, instead, runners will complete 4 laps of 25 mile loop, after that, runners have option to run 25 mile loop or 50k loop, last 3 hours, runners will run on a 3 mile out and back.

Runners will get gold or silver or bronze buckle for first 100 miles based on their finish time. Ater 100 miles, if they finish another 100k or 50 miler or 50k, they will get another buckle, if they finish a 10k, they will get a medal.

Who wants to Join the Challenge?

Where to stay?

Free camping at start/finish.

Mesquite Nevada is about 8 miles from race site, here is the list of hotels and casinos

Check out this post for hotel discount.


Please see this post.

If you have more questions, please contact us or leave comments at this post.

Local time: 6:54 AM

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