Thirty four miles on the same ground the 50 Mile is known for: runnable jeep roads between steep climbs, ladders and short scrambles, through Owl Canyon, Antelope Canyon, Deer Canyon and Ligai Si Anii, then technical canyon and exposed slickrock up to Antelope Ridge and back across open desert to the finish. It starts alongside the 50 Mile at five in the morning with thirteen hours to finish.
The ground is what defines this course. The race calls it deep sand, rising slickrock, and more sand waiting on the other side, and its own description of the long courses lists sandy jeep roads, exposed slickrock, steep climbs, ladders and short scrambles, with sections of via ferrata and cable-assisted descents in the canyons. Runners have written about queueing at the fixed ladders while the field is still bunched. Trekking poles are permitted. The published climb is 3,413 feet across 34.2 miles, from a low point of 4,194 feet to a high point of 5,682 feet.
Antelope Canyon Ultras runs out of the Page Sports Complex in Page, Arizona, on a course of deep sand, open slickrock and slot canyons above the Colorado River. Four distances share the one start line: 50 Mile, 55K, 30K and a trail half marathon. The two long courses drop into narrow canyons on fixed ladders and cable-assisted sections, cross open desert near Horseshoe Bend, Marble Canyon and Lake Powell, and finish on the Page Rim Trail. It is run in early March, and the race says the terrain shows no mercy: deep sand, rising slickrock, and more sand waiting on the other side.
The first Antelope Canyon 50 Mile was run on 1 February 2014, with Matt Gunn as race director. Gunn had founded the Ultra Adventures series two years earlier with the Zion 100. The race sat in February through 2018 and has been held in March since 2019. The 2026 edition was put on by Vacation Races, and from 2027 the race is run by Aravaipa Running, which now directs Ultra Adventures.
| Mile | Station | Cutoff | Crew access | Bag | Pacer | Med | To next |
|---|---|---|---|---|---|---|---|
| 0.00 | Start | ? | ? | ? | ? | ? | 6.20 |
| 6.20 | Antelope Canyon | ? | ? | ? | ? | ● | 7.00 |
| 13.20 | Deer Canyon | ? | ? | ? | ? | ● | 8.40 |
| 21.60 | Ligai Si Anii | ? | ? | ? | ? | ● | 7.90 |
| 29.50 | Antelope Ridge | ? | ? | ? | ? | ● | 4.70 |
| 34.20 | Finish | ? | ? | ? | ? | ? | ? |
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