February 7 - 9, 2020

Grandmaster Ultras

Beaver Dam Station, 402 Co Hwy 91, Littlefield, AZ

Littlefield, AZ 100 Miler, 100K, 48hrs, 50 Miler, 50K

Registration closes: Sat, Feb 8 @ 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. 50K and 50 miler runners start on Saturday, they will have 24 hours to finish the race.

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


Must be 50+ years old on race day.

Course description (2020 course)

The course is 50 miles loop with elevation gain of 2500 feet, minimum elevation is at 1900 feet, max at 2600 feet. 20 miles on rough country road, and 30 miles on ATV trails. No steep climbs, some parts are sandy, and some parts are rocky. Click here for route map.

100 miler runners will run the 50 mile course twice.

50K route is an out and back, runners follow rough country road for 12.6 miles to NV/AZ border, then turn right, run 3.7 miles of rolling sandy ATV trails along the border to "3 corners", then turn around, run back to start/finish. 50k course has 1800 feet gain and loss. Click here for 50K route map and elevation profile.

100k runners will do 50k course twice.

Here's the post about "3 corners" area.

UTMB points

100 miler: 5 points
100K: 3 points
50 miler: 3 points
50K: 2 points

48 Hour Challenge

48 hour Challenge: this won't be a traditional timed event on 1 or 2 mile lap, instead, runners will complete 100 miler, after that, runners have option to run 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?

Finisher Buckles

Aid Stations

50 miler: mile 1.7 (water only and road crossing), 7.4, 11.4, 15.2, 18.2 (water only), 23, 25.6, 30, 34.8, 37.8, 44.5, and 47.8 (water only and road crossing)

50K: mile 1.7 (water only and road crossing), 5, 6, 9.8, 12.8 (water only), 16.3, 19.8, 22.8, 26.6, 27.6, 30.9 (water only and road crossing)

Please visit Aid Station page for more details.

Cutoff Time

100 miler and 100K: 48 hours, must start 2nd lap no later than 8am on 2/8
50 miler and 50K: 24 hours

3 Corners

3 states' borders, UT, NV and AZ, meet at this spot. Mile 25.6 for 50 miler, and mile 16.3 for 50K

Our Sponsors


Refund and Rollover

There will be no refund.

If you cancel 180 days before race day, 100% will be rolled over to the next year race, if you cancel 120 days before race day, 75%, if you cancel 90 days before race day, 50%, if you cancel 60 days before race day, 25%. Within 60 days, no rollover.

Where to stay?

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


Please see this post.

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

Local time: 4:07 AM


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