The Zane Grey Highline Trail 50 Mile run is one of (if not the most) difficult 50 mile 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 50. 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).
Out and back, west then east. From the Rim Top Trailhead to the Tonto Fish Hatchery  and Back along the Military Sinkhole Trail and Highline Trail.
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.
No. By registering you are agreeing that entry fees are necessary to meet the costs of preparation months in advance of the Run, and that if the Run is cancelled because of fire, drought, storms, acts of war, acts of God, or other circumstances beyond the control of the race management, the entry fee will not be refunded.
Yes, from the 33-mile aid station (Fish Hatchery) to the finish.
50 ounces minimum between See Canyon and the Fish Hatchery.  Many runners use a full bladder plus hand bottles depending on the weather conditions for that stretch bottles. Expect to take 3 to 4 hours to get between those two points, and you have to do it twice. This is the hardest stretch.
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.
No, the situation will be assessed every year and all options will be considered.
No.  This is due to the nature of the course and terrain and the interest of the safety of all participants.