Grandmaster Ultras 2026

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 or when it gets dark. For 50K and 50M runners,  you can also have pacer if you finish in the dark. Pacer can start pacing from any crew accessible aid station. For any runners over 70 years old, pacers are allowed from the start for all races.

Start/finish area is located at lat 36.8272085438359, long 113.997853251625

The main course is a 50K, featuring clockwise Thelma Louise loop, and 6.2 mile out-and-back, elevation gain and loss of 1580 feet, minimum elevation is at 1722 feet, maximum at 2605 feet, at mile 19, you will reach Thelma Louise site.

50 miler course will run Thelma Louise loop twice before returning to start/finish, total elevation gain and loss 2450 feet.

100 miler runners will run 50 miler course twice. 

100K runners will run 50K course twice.

From Start, running downhill, at mile 0.6 enter a tunnel, at mile 1, turn right, climb up a short but steep hill, at mile 1.5, take left fork and reach Oasis aid station (36.84685, -114.00539) at mile 1.9.

From Oasis, another 4 miles of rocky ATV trail to Cross Roads (36.90197, -114.01001) water stop at mile 6.2. Go STRAIGHT for about 3.6 to reach Junction (36.95429, -114.00749) aid station at mile 9.8.

From Junction aid station, turn LEFT going towards Stateline for about 2 miles, turn RIGHT, go along power line for 1.9 miles, turn RIGHT, go another 0.3 mile, turn LEFT, there will be a water stop (36.96749, -114.00545) at 13.8, follow ATV trail for 3.2 miles, to reach Cattle Gate aid station (36.93249, -114.00167) at mile 17.2.

From Cattle Gate, turn LEFT, follow ATV trail along the fence for about 1.8 miles to Thelma and Louise site at mile 19, turn RIGHT, go about 1 mile, turn RIGHT at water tank, go about 1 mile, turn LEFT, go about 1.2 miles to main dirt road, turn RIGHT, climb up dirt road for 1.5 miles to Overlook (36.89964, -113.99236) aid station at mile 23.7.

From Overlook, go STRAIGHT, 1 mile to Cross Roads water stop, 50M/100M turn RIGHT to repeat Thelma Louise Loop, then follow rest of 50K course, 50K/100K runners turn LEFT, follow 4 miles of rocky ATV trails to unmanned Oasis. Go straight, then take RIGHT fork, go about 0.9 mile, turn LEFT at the bottom of the hill, go about 0.4 mile, go through the tunnel, another 0.3 mile, turn LEFT, back to start/finish.

50M course profile on Garmin Connect: https://connect.garmin.com/modern/course/edit/257652206

Google Map: 50M course map

View 50M course map on Google Earth

50K course profile on Garmin Connect: https://connect.garmin.com/modern/course/257650669

Google Map: 50KM course map

View 50KM course map on Google Earth