February 8 - 9, 2019

Grandmaster Ultras

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

This Event Took Place Sat. Feb 9, 2019

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While this event is not currently available for registration on UltraSignup, we are happy to share the amazing achievements of trail and ultra runners around the world. You can see your individual results on your personal results page

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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 and 100k after first lap. For any runners over 70 years old, pacers are allowed from the start for all races.


Must be 50+ years old on race day.

Start/Finish Location

New proposed start/finish area is located at lat 36.8272085438359, long 113.997853251625

At mile 0.8, you are going through a tunnel, at mile 1, there's a short steep hill, you will reach Oasis aid station at mile 1.9.

Aid Stations

50 mile course will have aid station at mile 1.9, 6.1, 12.4, 18, 24.5, 30.1, 33, 39.7, 47.2 and start/finish.

50k course will have aid station at mile 1.9, 6.1, 12.4, 15.4, 22, 29.5 and start/finish

Cutoff Time

100 miler and 100K: 48 hours, must start 2nd lap no later than 8am on 2/12
50 miler and 50K: 24 hours

3 Corners

3 states' borders, UT, NV and AZ, meet at this spot. Mile 22.2 for 50 miler course.

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

Event's current local time: 8:52 AM MT

Top Performances