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⏵ Course guide · New Mexico ultra

Mt. Taylor 50K Course Guide

The Mt. Taylor 50K is a runner-built, nonprofit mountain ultra in the Cibola National Forest outside Grants, New Mexico, and it is one of the most loved hard 50Ks in the state. It climbs from high-desert forest all the way up an 11,301 foot volcano, runs a stretch of the Continental Divide Trail, and drops you into a caldera before the finish, with the whole thing sitting above 9,000 feet. I will walk you through the course first, then give you an altitude-smart pacing and fueling plan. There are free calculators along the way to dial in your own numbers.

⏵ At a glance

Mt. Taylor 50K quick facts

Date
Saturday, September 26, 2026 (late September each year)
Location
Rock Tank Shelter, Cibola National Forest, near Grants, NM
Distances
50K (single distance, about 31 mi)
Elevation gain
About 7,000 ft of gain and loss, topping out on the 11,301 ft summit
Start
6:30 AM (check-in opens 5:45 AM)
Cutoff
11 hr overall, with intermittent cutoffs (noon at Rock Tank mile 16, 3:30 PM at Caldera Rim mile 25)
Qualifier
No Western States, Hardrock, or UTMB qualifier status listed by the race

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

The course: where Mt. Taylor is won and lost

This is a high-country point-to-point feel built from a handful of big climbs and descents, about 31 miles with roughly 7,000 feet of gain on a mix of dirt road, singletrack, the Continental Divide Trail, and open meadow. It starts and finishes near the Rock Tank Shelter, and every mile of it is above 9,000 feet. The day is less about a pace chart and more about meeting each climb at the right effort.

The early miles: a long runnable road climb

You start before dawn and the first chunk is a long, runnable climb and descent on dirt forest roads, with the sunrise coming up over the high country as you go. It feels easy and it is tempting to hammer it, especially in the cool morning air. Don’t. This is exactly where flatlanders cook themselves: the grade is gentle, the altitude is already real, and any energy you burn here gets billed back to you on the summit climb later.

After the road you roll onto rougher trail and into a stretch of the Continental Divide Trail, which is steep, rolling, and relentless in its own quiet way. Keep it honest and easy. You want to reach the base of the big climb feeling like you have barely started.

The summit: the climb the whole race is built around

The crux is the long push to the 11,301 foot summit of Mt. Taylor, roughly a 2,000 foot climb that starts on a gorgeous gravel road and then steepens toward the top. This is where the race is won and lost. Up this high the air is thin enough that almost everyone hikes the steep parts, and that is the smart move: pick a strong, sustainable power-hike, keep your effort even, and let the people who are overcooking it come back to you later.

The payoff at the top is a 360-degree view across northwestern New Mexico, and it is genuinely worth the work. It is also cold and exposed up there, with chilly windchills common even when it was warm down low, so do not get caught underdressed at the high point.

The caldera and the steep finish

Off the summit you drop along the rim and down into the caldera, then you have to climb back out, a roughly 900 foot grind that lands at a hard moment in the day. After that comes the part people remember: a steep, technical descent toward the finish that some runners compare to dropping straight down a ski hill. It is fast if your legs and your nerve are still there, and brutal if you trashed your quads earlier.

Practice steep, controlled downhill before race day, because this finish punishes anyone who only trained the ups. Being able to keep your feet moving on a rough, steep grade when your legs are cooked is what separates a strong finish from a long, careful hobble to the line.

Aid stations and the long gaps

The course is supported but spread out: there is a water-only stop early around mile 4, then stocked aid stations roughly at mile 10 (Spud Patch), mile 16 (Rock Tank, the start/finish area), mile 21 (Gooseberry), mile 25 (Caldera Rim), and around mile 29. They carry water, electrolyte drink, soda, and real trail snacks. The gaps in between, especially across the summit, are long and high and dry, so carry enough fluid and calories to get yourself from one to the next instead of running on fumes.

Two of those stops double as cutoffs, Rock Tank at mile 16 and Caldera Rim at mile 25, so treat them as checkpoints you have to reach with time in hand, not just places to grab a cookie.

Pacing strategy for a high-altitude climbing 50K

With about 7,000 feet of gain, a summit over 11,300 feet, and the whole course above 9,000, Mt. Taylor is about managing effort in thin air, not chasing splits. Run the climbs by feel, hike the steep stuff without guilt, and save your legs for that steep finish.

Pace the climbs by grade and altitude, not the watch

Your flat-ground pace is meaningless here, and so is your sea-level pace if that is where you train. What matters is grade-adjusted effort, dialed down a notch for the altitude. Hold a steady output you can sustain up the grade, power-hike the steep pitches, and accept that everything feels harder than the numbers say up high. The classic mistake is running that gentle early road climb too hard because it feels easy at 9,000 feet, then falling apart on the summit push. Use a grade-adjusted pace to turn your real fitness into honest climbing and descending targets so you don’t blow the first half.

Build a vert-aware, altitude-honest finish prediction

Do not guess your Mt. Taylor finish off a road 50K time. The 7,000 feet of climbing, the technical descents, and the thin air all add real time, and the intermittent cutoffs at miles 16 and 25 mean you need a plan, not a hope. A vert-aware finish prediction that accounts for this course’s climbing gives you a realistic window and lets you work backward into those cutoffs, so you actually know how much buffer you are carrying at each checkpoint instead of finding out the hard way.

⏵ Free tools to pace this course

Fueling strategy for altitude and the long day

Most runners are out on the Mt. Taylor 50K for somewhere around 5 to 11 hours, all of it at altitude in dry mountain air with long gaps between aid. That makes carbohydrate, sodium, and fluid every bit as important as your fitness, maybe more.

Carbs: steady, simple, and altitude-friendly

For a 5 to 11 hour effort, aim for around 60 to 90 grams of carbohydrate per hour, and be honest about the altitude: up high your gut slows down and your appetite disappears, so lean toward the lower end of that range if your stomach is fighting you and keep your fuel simple and easy to swallow. Steady small doses beat big late gambles every time up here. Practice your race-day carb rate on long climbing runs, ideally at elevation if you can get it, so eating on the move feels normal instead of like an experiment.

Sodium and fluid: the dry air steals more than you think

Dry, thin mountain air pulls water out of you faster than the heat down low ever warns you about, and a lot of runners show up to that summit climb quietly dehydrated. Keep drinking on a schedule and pair it with steady sodium, often in the range of 300 to 700 milligrams per liter of fluid, more if you are a heavy or salty sweater. Just as important, carry enough between aid stations to cover the long high gaps, especially over the top, instead of rationing to the next stop and arriving empty. Weigh yourself before and after a long climbing run to find your real sweat rate and 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 high-altitude Mt. Taylor 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 Mt. Taylor course profile, and your projected splits. Summit Line reads your real training, builds a plan for the climbing and the altitude, and rehearses your fueling so race day is something you execute, not guess at.

Mt. Taylor 50K FAQ

How hard is the Mt. Taylor 50K?

Mt. Taylor 50K is a genuinely hard mountain ultra, and the altitude is what makes it bite. You cover about 31 miles with roughly 7,000 feet of climbing and descending, the entire course sits above 9,000 feet, and you tag the 11,301 foot summit of a volcano partway through. The footing runs from smooth dirt road to rocky ridgeline and a steep, technical drop at the end, and the overall cutoff is 11 hours with intermittent cutoffs along the way. If you respect the thin air and pace the climbs by effort, it is very doable, but it is not a place to wing it.

How much climbing is in the Mt. Taylor 50K?

It is about 7,000 feet of total elevation gain (and the same coming back down) across the 50K, per the official race. The day is built around a few distinct climbs: a long runnable road grind early, rolling miles on the Continental Divide Trail, the big roughly 2,000 foot push to the summit, then a drop into the caldera and a steep climb back out before the final descent. Nothing is flat for long, so you are either going up or coming down most of the day.

How should I fuel for the Mt. Taylor 50K?

Treat it as a 5 to 11 hour high-altitude effort where your appetite fights you and the air is dry. Most runners do well on roughly 60 to 90 grams of carbohydrate per hour, leaning lower if your stomach is struggling up high, plus steady sodium and fluid because the dry mountain air pulls more water out of you than you notice. Altitude slows digestion, so keep your fuel simple and easy to get down rather than gambling on big late doses. Run your own numbers for your weight, goal time, and the conditions with the free ultra fueling calculator.

What are the cutoff times for the Mt. Taylor 50K?

The race has an overall limit of 11 hours, with intermittent cutoffs you have to make along the way. The two published checkpoints are noon at the Rock Tank aid station near mile 16 and 3:30 PM at the Caldera Rim aid station near mile 25, with the finish closing around 5:30 PM. Those intermediate cutoffs mean you cannot bank all your time for the end, so confirm the exact current cutoffs in the race-day details before you start.

How does the altitude affect the Mt. Taylor 50K?

A lot, and it is the single biggest thing flatlanders underestimate here. The whole course is above 9,000 feet and the summit is over 11,300, so the air holds noticeably less oxygen than most people train in. Expect your climbing pace to feel harder than the grade suggests, your heart rate to sit higher, and your stomach to get fussier the higher you go. If you live near sea level, give yourself easy effort on the climbs, slow your eating and drinking to match, and if you can, arrive a few days early or come in the day before and race before the altitude catches up to you.

What is the terrain and weather like at Mt. Taylor?

The course mixes smooth dirt forest road, singletrack through pine and aspen, open alpine meadow, and about eight miles of the Continental Divide Trail, with a steep, technical descent near the finish that some runners compare to dropping down a ski hill. Late September in the high country is unpredictable: cool to cold at the early start, warm and exposed in the sun, and genuinely cold and windy near the summit, where chilly windchills are common. Pack for both ends of that range and do not get caught underdressed up top.

This guide is independent and for planning only. The course details, dates, 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.