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Calico Trail Run Course Guide

The Calico Trail Run is a desert 50K and 30K that loops through the Calico Mountains out of historic Calico Ghost Town in the Mojave. Rocky mining canyons, jeep roads, sandy washes, big sky, and a cool January morning. I will walk you through the course, then give you pacing and fueling strategy built for exactly this kind of desert terrain and climate, plus the free tools to dial in your own numbers.

⏵ Quick facts

The Calico Trail Run at a glance

Date
Sun, January 24, 2027 (7:00 AM start)
Location
Calico Ghost Town, Calico Mountains, Mojave Desert, CA
Start / Finish
36600 Ghost Town Road, Yermo, CA (about 10 mi north of Barstow)
Distances
50K (about 31 mi) and 30K (about 19 mi)
Elevation gain (50K)
Roughly 3,700 to 3,900 ft of climb, with similar descent
High / low point
High near 3,956 ft, low near 1,987 ft
Terrain
Trails, jeep roads, rocky canyons, and sandy washes
Sanction
USATF sanctioned trail event

Note: the next edition is Sunday, January 24, 2027 (the 2026 edition ran January 25, 2026). The elevation figures come from public course data for the 50K loop and round to the nearest hundred feet. Aid-station count, exact aid mileages, and official cutoff times change year to year, so always confirm the date, route, aid, and cutoffs on the official Calico Trail Run site before you plan your race.

The course

It is a single loop through the Calico Mountains of the Mojave Desert, starting and finishing at historic Calico Ghost Town near Yermo, about 10 miles north of Barstow. It stitches together desert trails, jeep roads, rocky mining canyons, and sandy washes. The 50K is roughly 31 miles with about 3,700 to 3,900 feet of climbing, a high point near 3,956 feet and a low near 1,987 feet, so the whole thing sits below 4,000 feet and there is no altitude penalty. The 30K is a shorter version of the same desert terrain.

Out of the ghost town and into the canyons

You go off at 7:00 AM from Calico Ghost Town, a preserved 1880s silver-mining town, and the course pitches you into the surrounding Calico Mountains pretty quick. The early miles climb on a mix of jeep road and trail, up onto the open desert ridges where you start to see the colorful, mineral-streaked hills that give Calico its name. There is no altitude to manage, so just settle into an effort you can hold all day and let the terrain set your pace instead of the clock.

The grades are moderate by ultra standards. It is more rolling jeep-road and canyon climbing than one giant mountain, so the work is in stringing together a lot of short climbs and descents without wasting energy, not in surviving one huge ascent.

The rocky canyons and Mule Canyon

The signature stretch is the rock running through the mining canyons, and Mule Canyon is the highlight. It is narrow, twisting, and technical, with some of the most fun rock scrambling on the course. This is where quick feet matter. Pick your line, keep your feet light, and protect your ankles on the uneven rock. The people who charge the technical sections without thinking are the ones who roll an ankle or burn themselves out fighting the ground.

Shoes with real grip and a rock plate earn their keep here. And the canyons are where you can make up time on the more cautious runners if you are comfortable on technical ground, so get some rocky descending in during training if you want to actually race this part instead of just surviving it.

The sandy washes are the hidden tax

Between the canyons the course drops into sandy desert washes, and these are tougher than they look. Soft sand takes away your push-off, slows you down, and quietly drains your legs, and it gets worse deeper into the 50K. The mistake is treating a flat sandy wash like flat road and then wondering why your effort just spiked. Shorten your stride, lift your feet, and accept that the washes are going to feel slow.

Plan your pacing so they do not catch you off guard. The mix of technical rock and energy-sapping sand is exactly why a sub-4,000-foot 50K can still be a real day out, and it is the part of the course where honest, effort-based pacing keeps you out of trouble.

Aid, exposure, and cutoffs

The loop is supported by aid stations stocked with water, electrolyte fluids, and food, and they are well placed for a course of this length. The route is desert with very little shade, so the gaps between aid are exposed to sun and dry air even on a cool January day. Carry enough fluid to cover each segment with room to spare instead of running yourself dry between stations.

The race starts at 7:00 AM and people generally call it beginner friendly with a forgiving time structure. But the official aid-station count, the exact aid mileages, and the cutoff times get set by the race each year, so go pull the current chart off the official Calico Trail Run site and build your plan around it, with a buffer.

Pacing strategy for the Calico Trail Run

With no altitude and only moderate vert, this is a course where the surface sets your pace, not the elevation. Pace by effort across the rock and sand and you will finish a lot stronger than the runner glued to a flat-ground minutes-per-mile target.

Pace by effort, not by the washes and rocks

Your moving pace is going to swing a lot between smooth jeep road, technical canyon rock, and soft sand, and that is exactly right. Trying to hold one steady pace number across all three surfaces is the fast way to overcook the sandy washes and show up to the back half empty. Run the runnable jeep road, pick smart lines through the rock, and accept the slow honest splits in the sand.

Use our free grade-adjusted pace calculator to turn your flat fitness into realistic effort targets for the climbs, and our race time calculator to set a finish goal that actually accounts for the vert and the terrain instead of a flat-course fantasy.

Train your feet for technical and soft ground

The single most race-specific thing you can do for Calico is train on uneven, rocky, and sandy ground so your ankles, feet, and the little stabilizer muscles are ready for it. Smooth-treadmill fitness does not carry over cleanly to twisting through Mule Canyon or grinding through a sandy wash. Train on road only and the terrain will feel harder and your splits will fall apart late.

To see whether your goal time is realistic, use our race equivalent calculator to turn a recent race result into a Calico 50K or 30K projection, then sanity-check it against the terrain instead of assuming road math holds up out in the desert.

Use the cool morning, then manage the sun

A late-January high-desert start is usually cool to cold, so the early hours are the time to bank steady, comfortable miles before the sun is fully up. Dress for a cold start you can shed, and do not cook yourself early by wearing too much. As the day warms and the exposed sections heat up, back off your effort a touch and stay on top of your fluid, because the dry desert air dehydrates you faster than the mild temperature lets on.

Fueling strategy for the Calico Trail Run

A cool desert morning is forgiving on fluid, but the dry Mojave air and the lack of shade still need a real hydration and sodium plan. Fuel the effort, not the temperature you can feel.

Carbs: steady and trained

For a 50K, aim for roughly 60 to 90 grams of carbohydrate per hour, leaning toward the high end once your gut is trained, and for the 30K you can sit in that range the whole way. Use a glucose-plus-fructose blend so you absorb more than a single sugar lets you, and rehearse your exact hourly carb number on long training runs so race day is just routine and not an experiment.

The cool January air actually helps you here, because a cool stomach handles fuel better than a hot one. So Calico is a good race to practice fueling at the higher end of your range.

Sodium and fluid: dry air, not high heat

A Mojave January morning is usually cool, so your sweat rate is lower than it would be in a summer race and you do not need huge sodium concentrations. Around 400 to 600 mg of sodium per liter of fluid is a good starting point for most runners, and you bump it up if the day turns warm. The trap is the dry desert air and the full sun, which pull water out of you faster than the mild temperature lets on, so keep sipping steadily and carry enough between aid stations on the exposed stretches.

Dial in your own plan with our free ultra fueling calculator. Put in your weight, your goal time, and the conditions you expect, and it gives you a carb, sodium, fluid, and caffeine number per hour built for the Calico distance and the desert climate. Then go test it in training.

⏵ Free calculators for this race

Run your Calico numbers with our free, no-signup tools, then let Summit Line tie them all back to your real fitness and this exact course.

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Train for the Calico Trail Run

Calico is a friendly first ultra, but the terrain pays you back for preparing specifically. These guides cover the basics for a 50K or 30K on technical desert ground.

⏵ Train for the Calico Trail Run

Get a race-day plan dialed to YOUR fitness, this exact course profile, and your projected splits. Summit Line reads your actual training, builds a fueling and pacing plan around the Calico terrain and the desert climate, and tracks how your gut and legs handle the load, so race day is rehearsed instead of guessed.

Get started free →See it on a real race

Calico Trail Run FAQ

How hard is the Calico Trail Run?

It is an approachable desert ultra, not a high-altitude monster, and it is honestly a pretty good day out. The 50K is about 31 miles with around 3,700 to 3,900 feet of climbing on a single loop out of Calico Ghost Town, and it tops out below 4,000 feet, so altitude is not a thing here. What makes it interesting is the ground under your feet. You get rocky mining canyons, jeep roads, and sandy washes through the Calico Mountains of the Mojave Desert, and it is the footing in the technical canyons and the soft sand that slow you down, not the climbing. The 30K is the friendlier way in at about 19 miles on the same kind of terrain.

How much climbing is in the Calico Trail Run?

The 50K carries roughly 3,700 to 3,900 feet of gain, with a high point near 3,956 feet and a low point near 1,987 feet, and it gives back about as much as it climbs. That is moderate vert for a 50K. It is spread across canyon climbs and jeep-road grades instead of one big mountain, and the 30K is a shorter loop with less of it. Nothing is at altitude, so you can pace the climbs by effort and not worry about the thin-air penalty you would get on a high mountain ultra.

How should I fuel for the Calico Trail Run?

You are fueling a moderate desert effort in cool-to-mild January air, so it is forgiving. Most runners go for 60 to 90 grams of carbohydrate per hour, and on the 50K you can lean to the high end once your gut is trained for it. Your sodium needs are lower here than in a hot summer race because a January Mojave morning is usually cool. But the desert air is bone dry and you will still lose fluid you never feel, so do not skip the electrolytes. Start somewhere around 400 to 600 mg of sodium per liter of fluid and adjust from there once you see how warm the day gets. Our free ultra fueling calculator will build you a carb, sodium, and fluid plan per hour off your weight, goal time, and the conditions you expect.

What are the cutoffs for the Calico Trail Run?

The race starts at 7:00 AM and is run as a supported single loop. The official cutoff times get set by the race each year, so I am not going to quote a number here and risk it being stale. This is a generously timed, beginner-friendly desert event, so for most finishers the cutoffs are not the thing that gets you. The terrain is. Go confirm the current start time, any aid-station cutoffs, and the overall time limit on the official Calico Trail Run website before you build your race plan.

What is the terrain and climate like at the Calico Trail Run?

The course loops through the Calico Mountains out of historic Calico Ghost Town on a mix of trails, jeep roads, rocky mining canyons, and sandy desert washes. The rock running in the canyons is technical and genuinely fun, and the sandy washes are tougher than they look, because soft sand quietly steals your energy and your pace. The race goes off in late January, when the high desert is usually cool to mild in the day and can be cold at the early start, with low humidity and a lot of exposure once the sun is up. There is very little shade out there, so even on a cool day you are still managing the sun.

Is the Calico Trail Run a good first ultra or first 50K?

Yes. Moderate climbing, no altitude, a generally forgiving cutoff structure, and both a 50K and a shorter 30K to pick from, so it is a popular first desert ultra and a good one. The honest challenges are the technical rock footing and the sandy washes, plus the dry desert air, not brutal vert or thin air. Train your feet and ankles on uneven ground, get some time running soft surfaces, and rehearse your fueling. Do that and it is a very achievable first 50K.

This guide is for planning and training purposes and reflects publicly available information about the Calico Trail Run. Race details, including the date, course, aid stations, and cutoffs, can change year to year. Always confirm the current specifics on the official Calico Trail Run race website before you train or travel.