The Zane Grey Highline Trail 100K run is one of (if not the most) difficult 100K races in the country. It is an advanced degree run for EXPERIENCED ultrarunners. This means if you have never participated in an ultra distance run before (sorry…triathlons don’t count) then do one of the MANY other ultra runs around the country BEFORE running the Zane Grey 100K. There are sections of this course where you are out on your own for very extended periods of time WITHOUT aid. You have to have proven that you can be self-sufficient. Race management would like to avoid having to send out search and rescue to retrieve runners on the course. We’ve had to do this several times in the past (We’re not kidding).
Point-to-point, west to east. From the Pine Trailhead to the Rim Top Trailhead along Highline Trail. See map on course page for more details.  See map on course page for more details.
Average high temperature 74 degrees (88 degrees record high)
Average low temperature 36 degrees (20 degrees record low)
Sunrise 5:42 a.m.
Sunset 7:05 p.m.
NO! Even the most experienced ultramarathon runners have difficulty completing this event. Combining the elements of difficult terrain, heat, elevation, and challenging navigation makes this not a good choice for a first-timer. Aravaipa Running has a trail running series. All of their trail 50K runs are excellent qualifiers.
Yes, from the 37-mile aid station (Tonto Fish Hatchery Trailhead) to the finish.
50 ounces (1.5L) minimum. Many runners use a full bladder plus hand bottles depending on the weather conditions for that stretch. Expect to take 3 to 4 hours to get between many of the aid stations that are close to 10 miles each.
The fluids will include: water, electrolyte drink , cola, ginger ale, Mountain Dew and ice (I know, ice is not a liquid). Last year the food included bananas, oranges, potatoes, chips, cookies, PB&J sandwiches, salt, pretzels, various candies, and your drop bag if you provide one. If there is a particular item you feel you must have, then put it in your drop bag.
Drop bags are at all the aid stations with the exception of Hell’s Gate and Horton Creek.  Horton Creek is a remote, water only aid station (supplied by natural spring water).

Please mark your drop bag with your bib number, your name, and the aid station name:
– Geronimo Trailhead
– Washington Park
– Tonto Fish Hatchery
– See Canyon
– Two Sixty TH