The course
Pass Mountain is run out of Usery Mountain Regional Park on the edge of the Goldfield Mountains, stitching together winding cholla-forest singletrack, the flat Levee Trail, the climb up and around Pass Mountain in the Tonto National Forest, and, on the 50 mile, remote OHV and Maricopa Trail miles through the Goldfields. It is the flattest, most runnable race in the Desert Runner Trail series, a low-elevation desert course with no real altitude to manage.
The 25K and 50K loops
The 25K is one big park loop, and the 50K is two of them, with runners passing back through the finish area at the halfway point. The loop rolls through cholla forests, runs the flat Levee Trail with long views of Pass Mountain and the Superstition range, and then climbs all the way up Pass Mountain in the Tonto National Forest. It is highly runnable, around 97 percent runnable by some accounts, with rocks, a few steep pitches, and the Pass Mountain climb as the main features.
Because the terrain is so runnable, this is a course where pacing discipline matters in a different way than on a big mountain ultra. There is no long forced hike to slow you down, so it is easy to run the early loop too hard and pay for it in the sun later. Treat the first loop as a controlled effort and let the second loop be where you race.
The 50 mile: out into the Goldfields
The 50 mile leaves the comfort of the park and heads through the southern edge of the Tonto National Forest into the lesser known Goldfield Mountains. This section is mostly OHV trail with some singletrack mixed in, traversing scenic Bulldog Canyon and crossing sandy washes that drag at your stride. Runners link to the Maricopa Trail around the halfway point, continue northwest into the Hawes Trail System, and then head back to Usery via the Pass Mountain Trail.
The remote Goldfield miles are where the 50 mile is won or lost. The footing is honest but the sandy washes and exposed OHV road can feel relentless under the afternoon sun, far from the start and the crowd. Keep your effort honest, keep eating and drinking through the quiet middle, and save something for the return over Pass Mountain.
Exposure and the desert sun
There is very little shade out here. The defining environmental challenge at Pass Mountain is not altitude or cold or big climbing, it is the open Sonoran Desert sun. Mid November mornings near Mesa are cool, often starting in the 40s or 50s, but the afternoon can climb into the 70s with direct sun on exposed trail, which feels considerably hotter than the air temperature when you are working.
Dress for the swing. Start in a layer you can stuff in a pack once the sun is up, wear sun protection, and manage your core temperature actively at the aid stations. The dry air also means you can dehydrate without feeling especially sweaty, so do not let the comfortable numbers fool you into under-drinking.
Aid stations and cutoffs
The course is well supported, with aid stations roughly every 3 to about 9 miles carrying water, electrolyte drink, sweet and salty snacks, and fruit, plus drop bags at the major points. The 50 mile has an overall limit around 16 hours, with intermediate cutoffs near mile 27 and mile 44 that you must clear to keep going. Each shorter distance has its own start time and limit.
Because the trail is so runnable, the cutoffs are generous for a fit runner, but do not treat them as a free pass. The remote Goldfield section and the sun can slow you more than the gentle elevation profile suggests. Build your pacing plan backward from the cutoffs with a buffer, and confirm the current chart for your distance on the official Aravaipa page.
Pacing strategy for Pass Mountain
A runnable, low-vert desert course rewards even effort and punishes a hot start. With no big climbs to force you to slow down, the discipline has to come from you, especially before the afternoon sun arrives.
Run the runnable course honestly
Most of Pass Mountain is genuinely runnable, so your moving pace will be steadier than on a mountain ultra. That is the trap: it is easy to bank time early at a pace that feels fine in the cool morning, then cook in the open desert after the sun is up. Settle into an effort you can hold once it warms, and let the early miles feel almost too easy.
Use our free grade-adjusted pace calculator to translate your flat fitness into honest targets for the rolling sections and the Pass Mountain climb, so you know whether you are pacing the day sustainably or spending energy you will want in the Goldfields.
Power-hike the climbs, run the flats
The vert is modest, but the Pass Mountain climb and a few steep pitches are still better power-hiked than forced into a run. Hike them efficiently and get back to running on the levee and the rolling singletrack, where the time is actually made on this course. A clean, repeatable run-hike rhythm beats hero efforts on the short climbs.
To set a realistic finish goal for your distance, use our race time calculator. It factors the climbing into your projected finish so you are pacing to a number that fits the actual course rather than a flat road estimate.
Plan for the sun, not the cold
The morning is cool, but the deciding hours are the warm, exposed afternoon ones, especially on the 50 mile out in the Goldfields. Pace the first half so you arrive at the hottest, most remote stretch with energy to spare, then ride a steady effort to the finish. This is a course where the runners who started conservatively pass the ones who went out hard.
If you want to know how your fitness from a recent race translates to this distance and terrain, our race equivalent calculator helps you reality-check your goal before you commit to a finish time.
Fueling strategy for Pass Mountain
On a runnable course, fueling and hydration are what stand between a strong finish and a slow grind. The dry air and exposed sun make fluid and sodium the variables to get right.
Carbs: feed the runnable pace
Because so much of Pass Mountain is run rather than hiked, you are burning carbohydrate at a steady clip the whole way. Target roughly 60 to 90 grams of carbohydrate per hour, leaning to the high end once your gut is trained, using a glucose-plus-fructose blend so you can absorb more than a single sugar allows. Rehearse your exact hourly number on long runs so it feels routine by race day.
The dry desert air can blunt your appetite even when your engine still needs fuel, so lean on drink-mix calories and easy-to-take gels through the warm middle hours when solid food sounds least appealing.
Sodium and fluid: built for the dry desert
Sonoran Desert air is dry, and sweat can evaporate before you notice it, so you can dehydrate without feeling drenched. Carry enough fluid to cover the gaps between aid, which run roughly 3 to 9 miles apart, and bias your sodium toward 500 to 700 mg per liter of fluid, adjusted to how salty a sweater you are. Cramping and a wrung-out late-race feeling are usually fluid and sodium problems, not fitness problems, on a course like this.
Dial in a personalized plan with our free ultra fueling calculator: enter your weight, your goal time, and the expected heat, and it gives you a carb, sodium, fluid, and caffeine prescription per hour built for the Pass Mountain duration and conditions. Then go test it in training.
This guide is for planning and training purposes and reflects publicly available information about the Pass Mountain Trail Runs. Race details, including the date, distance options, course, aid stations, elevation profiles, and cutoffs, can change year to year. Always confirm the current specifics on the official Aravaipa Running Pass Mountain page before you train or travel.