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⏵ Course guide · Arizona ultra

San Tan Scramble Trail Runs Course Guide

The San Tan Scramble is Aravaipa’s winter romp through the Sonoran desert at San Tan Mountain Regional Park, just southeast of Phoenix, and it is one of the friendlier ways to take on a desert 50K. Rolling Saguaro single-track, the short and nasty Goldmine climb, and a three-loop 50K that keeps you close to the start the whole day. I will walk you through the course first, then give you a pacing and fueling plan that fits the loops and the warm midday sun. There are free calculators along the way to dial in your own numbers.

⏵ At a glance

San Tan Scramble quick facts

Date
Saturday, January 9, 2027 (held in early January; the 2026 edition was January 10)
Location
San Tan Mountain Regional Park, Queen Creek, AZ, southeast of Phoenix
Distances
50K (~31 mi), 26K (~16 mi), 17K (~10.6 mi), 9K (~5.6 mi), 5K (~3.1 mi)
Elevation gain
Modest and rolling, with the steep, rocky Goldmine climb on each loop; no official 50K vert number is published
50K start
7:00 AM
50K cutoff
About 9 hours (4:00 PM finish line close)
50K format
Three loops of the 17K course, run in alternating directions
Qualifier
No Western States, Hardrock, or UTMB qualifier status listed by the race

These facts come from the official race site and UltraSignup. Check the current date, start times, cutoffs, and aid stations in the race-day details before you commit. Race logistics change year to year.

The course: where the San Tan Scramble is won and lost

The 50K is three laps of the 17K loop, run in alternating directions, on rolling single-track that links the San Tan, Dynamite, and Goldmine trails. It is a desert course, not a mountain course, so the day is less about huge vert and more about the steep little Goldmine pitch, the soft sandy washes, and pacing three identical laps without burning a match too early.

The Goldmine climb: short, steep, and on every lap

Goldmine is the signature of this race. It is a very steep, rocky stretch that climbs hard for a short distance and rewards you with big desert views, and because the 50K is three loops you take it on three separate times. None of those climbs is long, but stack them up across the day and they add up, especially as your legs get tired. Hike the steep rock with purpose instead of trying to run it, keep your effort even, and you crest it with something left.

Because the loops alternate direction, you climb and descend Goldmine from both sides. The descent side is rocky enough that you want quick, careful feet rather than a reckless bomb, particularly on later laps when fatigue makes you sloppy and a rolled ankle ends your day.

The sandy washes: the quiet leg-tax

Parts of the San Tan Trail drop into soft, sandy wash, and that sand is the sneaky part of this course. It does not look like much, but running in loose sand steals energy and slows your pace without ever feeling like a real climb. Shorten your stride through it, stay relaxed, and treat it as effort you spend on purpose rather than a place to fight for speed.

Multiply those wash sections by three laps and they become a real factor late in the 50K. The runners who fade here are usually the ones who muscled the sand early. Float over it, save the legs, and you keep moving when others are reduced to a shuffle.

Three laps, one head game

The loop format is a gift and a test. A gift because you pass the start/finish between laps, you can stage a drop bag, crew can see you, and you always know exactly how much is left. A test because seeing the same trail three times wears on you mentally, and lap two is where a lot of people quietly check out. Break the race into laps in your head, run your own effort, and reset at each loop instead of letting the repetition drag you down.

Aid is well stocked and spaced roughly every 5 miles, but the gaps still warrant carrying fluid, especially once the sun is up. Plan to run with at least one bottle and top off every chance you get.

Pacing strategy for a three-loop desert 50K

San Tan rewards even pacing more than almost anything. The terrain is runnable, so the temptation is to go out fast on lap one and pay for it twice over. Run the loops by effort, hike the Goldmine pitch, and let the third lap be the one you are proud of.

Negative-split the laps, or at least hold even

The smartest way to run this race is to treat lap one as a controlled warm-up, lap two as steady work, and lap three as the lap where you finally let it out. The classic San Tan mistake is hammering the runnable early miles because the course feels easy and the morning is cool, then unraveling in the afternoon sun on lap three. Aim for an even or slightly negative split across the three loops and you will pass a lot of people late.

Pace the climbs by grade, not by the watch

Your flat-ground pace means nothing on the Goldmine pitch or in the sandy washes. What matters is grade-adjusted effort: hold a steady output you can repeat for three laps, hike the steep rock without feeling bad about it, and ease your stride through the sand. Use a grade-adjusted pace to turn your real fitness into honest targets for the rollers and the climb, and you will not cook yourself before the last loop.

Build a realistic finish window

Do not guess your San Tan finish off a flat road 50K time. The Goldmine climbs, the sandy washes, and the warm afternoon all add minutes. A finish prediction that accounts for this course gives you a realistic window and lets you work back into the 9-hour cutoff and any checkpoint cutoffs, so you know how much buffer you actually have at the end of each lap instead of guessing.

⏵ Free tools to pace this course

Fueling strategy for a dry desert ultra

Most runners are out on the San Tan 50K for somewhere around 5 to 9 hours, starting in the cool morning and finishing under a warmer sun in dry desert air. That makes carbohydrate, sodium, and fluid just as important as fitness, and the dry air hides how much you are sweating.

Carbs: steady and trained

For a 5 to 9 hour effort, aim for around 60 to 90 grams of carbohydrate per hour, and only push the higher end if your gut is trained for it. The loop format actually helps here: you pass the start/finish three times, so you can stage exactly the fuel you want in a drop bag. Keep your intake steady and easy to get down rather than gambling on big late doses, and practice your exact race-day carb rate on long runs so 80-plus grams an hour feels normal, not like an experiment.

Sodium and fluid: the desert hides your sweat

Dry desert air evaporates sweat before you notice it, so it is easy to under-drink and under-salt at San Tan and feel fine right up until you do not. Lean toward solid sodium intake, often around 500 to 700 milligrams per liter of fluid, and more if you are a heavy or salty sweater. Carry at least one bottle and top off at every aid station rather than rationing to the next one. Weigh yourself before and after a dry long run to find your real sweat rate, then build the plan around your own number.

⏵ Build your fueling plan

Get a carb, sodium, fluid, and caffeine plan per hour built for your weight, your goal time, and the dry desert conditions with the free ultra fueling calculator. Browse the rest of the free running tools at the tools hub.

⏵ Train for it with Summit Line

Get a race-day plan built around YOUR fitness, this exact San Tan loop profile, and your projected lap splits. Summit Line reads your real training, builds a plan for the Goldmine climbs and the sandy washes, and rehearses your fueling so race day is something you execute, not guess at.

Start free →Explore the demo

San Tan Scramble FAQ

How hard is the San Tan Scramble 50K?

It is one of the friendlier 50Ks in the Aravaipa winter lineup, but do not mistake friendly for easy. The 50K is three loops of the 17K course on rolling Saguaro single-track, so the climbing is modest compared with a mountain 50K, and the cool January desert helps. The catch is the Goldmine climb, a short, steep, rocky pitch you hit on every loop, plus sandy wash sections that quietly tax your legs and the mental grind of seeing the same trail three times. The overall cutoff is about 9 hours, which is generous, so a prepared runner who paces the loops evenly and fuels well has plenty of room to finish.

How much climbing is in the San Tan Scramble 50K?

The race does not publish an official 50K elevation-gain figure, so I will not pin it to a number. What I can tell you is that the terrain is rolling rather than mountainous, on single-track through the San Tan, Dynamite, and Goldmine trails, and the standout feature is the Goldmine climb: a very steep, rocky stretch that you take on each of the three loops. Add up three trips over Goldmine plus all the smaller rollers and it is a real day of climbing, just not the relentless vert of a high-country ultra. Check the current GPX or course map on the race site if you want exact ascent for the year you run.

What is the loop format for the San Tan Scramble 50K?

The 50K is three laps of the 17K loop, and the loops alternate direction, so one lap runs the course clockwise and the next runs it the other way. That means you climb and descend Goldmine from both sides over the day, and the sandy wash sections come at you differently each lap. The flip side is that everything is familiar by lap two, you know exactly what is left, and you pass the start/finish area between laps, which makes it an easy race to crew and a forgiving place to attempt a first 50K.

What are the cutoff times for the San Tan Scramble 50K?

The 50K starts at 7:00 AM and the finish line closes around 4:00 PM, which gives you roughly 9 hours overall. There can be intermediate checkpoint cutoffs along the loops too, so do not bank your whole buffer for the last lap. The shorter distances have their own start times and shorter limits. Always confirm the exact start time and any intermittent cutoffs in the current race-day details before you toe the line, since Aravaipa adjusts logistics year to year.

What is the terrain and weather like at the San Tan Scramble?

The course is rolling single-track through classic Sonoran desert: Saguaro cactus, low foothills, and wide-open views, with the steep, rocky Goldmine climb and stretches of soft, sandy wash on the San Tan Trail. The footing ranges from smooth and fast to ankle-rolling rock, so quick feet help. Weather is the big draw: early January in the low desert southeast of Phoenix usually means cold mornings, dry air, and mild-to-warm afternoons under strong sun, which is why this is a popular winter destination race. It can still warm up by midday, so do not get caught without enough fluid.

Is the San Tan Scramble 50K a good first 50K?

Yes, it is one of the better first-50K options in the Southwest. The rolling terrain, the loop format that keeps you close to the start/finish, the cool winter weather, well-stocked aid roughly every 5 miles, and a generous cutoff all stack in a beginner’s favor. The honest prep is still real: train the Goldmine-style short steep climbs, get used to running on tired legs late, practice your fueling on long runs, and respect the sandy wash sections that sap your energy. Do that and the roughly 9-hour limit gives most committed first-timers room to finish.

This guide is independent and for planning only. The course details, dates, start times, cutoffs, and aid stations come from public sources and can change year to year, so confirm the current specifics with the official race before you register or run. The fueling and pacing advice is general and not medical advice.