If You Go
The races are all located in the “grand circle” area, which is in a ring that covers sections of Utah, New Mexico, Colorado, and Arizona where a high concentration of parks and spectacular scenery make for some world class ultra running.
Ultra Adventures also hosts races at Zion, Capitol Reef, Antelope Canyon, Monument Valley, Bryce Canyon and Tushars.
The races are moderately priced ($275 for a 100 miler). I found aid stations well stocked with a variety of foods, the course was well marked, and volunteers helpful and positive.
Weather did complicate matters during the Grand Canyon 100, and organizers were forced to re-route some of the shorter races held concurrently. A truck getting stuck also delayed some drop bag deliveries, but, in the wilderness, those things happen. The race did go on, with a remarkably high finisher rate.
I will be back to run more races by Ultra Adventures, although the distance, well, that remains to be seen.