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⏵ Course guide · Montana ultra

Don’t Fence Me In Trail Run 50K Course Guide

The Don’t Fence Me In 50K is Helena’s spring ultra, and it is a real mountain day: you start on downtown streets, hit rugged singletrack in minutes, summit both Mount Helena and Mount Ascension, and link five ridges across the South Hills before you are done. It has been a Prickly Pear Land Trust institution since 2000, so you are running decades of local trail-building. I will walk you through the course first, then give you a pacing and fueling plan that fits all that climbing and the cool May weather. There are free calculators along the way to dial in your own numbers.

⏵ At a glance

Don’t Fence Me In 50K quick facts

Date
Saturday, May 9, 2026 (typically the second Saturday of May)
Location
Start and finish at Pioneer Park, downtown Helena, MT; course over Mount Helena, Mount Ascension, and the South Hills
Distances
50K, 25K, 12K (closer to 13K), and 5K (plus a 12K hike and a 5K dog walk)
Elevation gain
50K: roughly 6,000 to 6,400+ ft (varies by year) · 25K: about 3,500 ft (1,078 m, UTMB-indexed)
50K start
7:00 AM MDT (25K at 8:00 AM, 12K at 10:00 AM, 5K at 10:30 AM)
Cutoff
50K: 3:00 PM finish, with intermittent cutoffs (about 12:30 PM at Mini Ridge near mile 19.5, 2:00 PM at Charlie’s near mile 25.5)
Qualifier
Both the 50K and 25K are UTMB Index races (Running Stones); USATF sanctioned. No Western States or Hardrock qualifier status.

These facts come from the official Prickly Pear Land Trust race site, RunSignup, and the UTMB Index listing. The 50K vert in particular varies between sources and course versions, so check the current date, cutoffs, and elevation in the race-day details before you commit. Race logistics change year to year.

The course: where Don’t Fence Me In is won and lost

The 50K is a big loop and traverse of Helena’s South Hills, roughly 30 to 31 miles with two summits and five ridges, on mostly rugged singletrack. You leave Pioneer Park, climb up onto the open space fast, and from there it is a long sequence of up-and-over: Mount Ascension, Mount Helena, Rodney Ridge, and the connecting ridgelines, with six aid stations spread across the trail system.

The summits: two real climbs, not rolling hills

This is not a course with one climb you grind out and then forget. You summit both Mount Ascension and Mount Helena, peaks that rise around 1,400 feet over the valley, and you string ridges in between, so the day is a repeating pattern of climb hard, crest, drop, repeat. That is where the race gets won or lost. The runners who blow up are the ones who attack the first couple of summits because the legs feel great early, then have nothing left for the back-half ridges.

Be patient on the climbs and hike the steep pitches with purpose. Power-hiking a steep grade efficiently is faster and cheaper than half-jogging it, and on a five-ridge course that savings compounds. Get to the high points with your effort even and you will still be moving well when the late ridges come.

The descents: fast, technical, and quad-wrecking if you overcook it

Every summit and ridge you climb, you come back down, and the descents here are rocky and quick. They are free speed if you saved your legs, and they are punishing if you did not. Repeated technical downhill late in a 50K beats up your quads, and the people who trashed their legs charging the early descents are the ones reduced to a careful shuffle by the final miles back toward town.

Practice controlled, runnable descending on rocky trail before race day. Being able to keep your feet quick and your legs turning over downhill when your quads are cooked is honestly what separates finishers’ times here more than climbing fitness does.

Aid, cutoffs, and the city-to-singletrack transition

The 50K runs through about six aid stations (Arrowroot Dr., Davis Gulch, Oro Fino Gulch, Mini Ridge, West End, and Charlie’s Trailhead), so you are never out there forever, but you still want to carry enough to cover the gaps between ridges. Watch the intermittent cutoffs: roughly 12:30 PM at Mini Ridge near mile 19.5 and 2:00 PM at Charlie’s near mile 25.5, with the finish at 3:00 PM. You cannot save all your buffer for the end.

One thing that makes this race special is how fast it flips from pavement to wild. You start in downtown Helena and you are on rugged singletrack within minutes. Enjoy that, but do not let the easy early street miles trick you into spending energy you will want when the first real summit shows up.

Pacing strategy for a five-ridge, two-summit 50K

With somewhere around 6,000 to 6,400 feet of gain broken into two summits and five ridges, this race is all about managing effort across repeated climbs, not chasing a flat pace chart. Run the climbs by feel, save the quads for the descents, and work backward into the cutoffs.

Pace the climbs by grade, not by the watch

Your flat-ground pace is meaningless on the Mount Ascension and Mount Helena climbs. What matters is grade-adjusted effort: hold a steady output you can sustain up the grade, and hike the steep pitches without feeling like you are losing the race. The classic Don’t Fence Me In mistake is running the early ridges too hard because the legs feel fresh, then falling apart on the later climbs. Use a grade-adjusted pace to turn your real fitness into honest climbing and descending targets so you do not torch the first half.

Build a vert-aware finish prediction and back into the cutoffs

Do not guess your Don’t Fence Me In finish off a road 50K time. The 6,000-plus feet of climbing, the technical footing, and the repeated descents all add real time. A vert-aware finish prediction that accounts for this course’s climbing gives you a realistic window, and then you can work backward into the intermittent cutoffs (Mini Ridge by about 12:30, Charlie’s by 2:00, finish by 3:00) so you know exactly how much buffer you should have at each checkpoint instead of guessing on the fly.

⏵ Free tools to pace this course

Fueling strategy for a cool, climbing-heavy 50K

Most runners are out on the Don’t Fence Me In 50K for somewhere around 5 to 8 hours, climbing hard the whole way. May in Helena is usually cool, which changes your fluid and sodium needs, but the carbohydrate math stays the same: keep the fuel coming.

Carbs: steady and trained for the long climbs

For a 5 to 8 hour effort with this much vertical, aim for around 60 to 90 grams of carbohydrate per hour, and only push the high end if your gut is trained for it. The repeated climbs quietly burn through your glycogen, and the runners who bonk on the late ridges are usually the ones who got behind on fuel early. Keep your intake steady and easy to get down rather than gambling on big late catch-up doses. Practice your exact race-day carb rate on long climbing runs so 80-plus grams an hour feels normal.

Sodium and fluid: adjust for the May weather

Because early May in Helena is usually cool, often in the 50s and 60s, you will likely sweat less than you would in a summer race, so you may not need as much fluid or sodium. That said, a clear, sunny day on exposed ridgelines can still pull more out of you than you expect, and altitude plus wind dries you out quietly. Carry enough to cover the gaps between the six aid stations comfortably, and lean on the cooler end of the sodium range unless you are a heavy or salty sweater. Weigh yourself before and after a long run to learn your real sweat rate, then build the plan around your own number and the forecast.

⏵ Build your fueling plan

Get a carb, sodium, fluid, and caffeine plan per hour built for your weight, your goal time, and the Don’t Fence Me In 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 Don’t Fence Me In course profile, and your projected splits. Summit Line reads your real training, builds a plan for all that climbing, and rehearses your fueling so race day is something you execute, not guess at.

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Don’t Fence Me In 50K FAQ

How hard is the Don’t Fence Me In Trail Run 50K?

It is a genuinely tough mountain 50K, not a flat city loop. The 50K tours all of Helena’s South Hills, summits both Mount Helena and Mount Ascension, and traverses five ridges, so you are climbing and dropping the whole day on rugged singletrack with somewhere around 6,000 to 6,400 feet of total gain. The cutoffs are real too, with the finish at 3:00 PM and intermittent cutoffs along the way, so steady climbing and smart fueling matter more than raw speed. If you respect the vert and pace the early ridges by effort, it rewards you on the back half.

How much climbing is in the Don’t Fence Me In 50K?

A lot for a 50K. The redesigned course racks up somewhere in the neighborhood of 6,000 to 6,400+ feet of vertical gain over roughly 30 to 31 miles, spread across two summits and five ridges rather than one big climb. Older listings cite closer to 4,000 feet, so the exact number depends on the year and the course version, which is why you should confirm the current figure with the race. The 25K is UTMB-indexed at 1,078 meters, which is about 3,500 feet.

How should I fuel for the Don’t Fence Me In 50K?

Treat it as a steady 5 to 8 hour climbing effort with six aid stations strung across the South Hills. Most runners do well on roughly 60 to 90 grams of carbohydrate per hour, leaning higher only if your gut is trained for it. May in Helena is usually cool, so you may not need as much sodium or fluid as a hot-weather race, but a sunny ridgeline day can still dry you out, so carry enough to get between aid comfortably. Run your own numbers for your weight, goal time, and the forecast with the free ultra fueling calculator.

What are the cutoff times for the Don’t Fence Me In 50K?

The 50K starts at 7:00 AM MDT and the course closes at 3:00 PM, which is about an eight hour limit. There are intermittent cutoffs along the way, with a checkpoint around 12:30 PM at Mini Ridge (near mile 19.5) and 2:00 PM at Charlie’s Trailhead (near mile 25.5), so you cannot bank all your buffer for the finish. The 25K has a 1:00 PM cutoff with its own mid-course gate. Confirm the exact intermediate cutoffs in the current race-day details before you start.

What is the terrain and weather like at Don’t Fence Me In?

You go from downtown Helena streets onto rugged singletrack within minutes, then spend the day on the open-space trails over Mount Helena and Mount Ascension. Expect rocky, sometimes loose footing, steep summit climbs, exposed ridgelines with big views of the Elkhorns and the Sleeping Giant, and fast technical descents. Early May weather in Helena is variable: highs often in the 60s, lows around freezing overnight, with a real chance of wind, rain, or even late-season snow up high. Pack layers and plan for whatever the mountains decide to do.

Is the Don’t Fence Me In 50K a good first 50K?

It can be a great goal race for a prepared first-time ultrarunner, especially if you love climbing and want a UTMB Index finish, but it is not an easy place to start. The five ridges, two summits, technical footing, and intermittent cutoffs all ask for specific prep: time on steep singletrack, practice climbing and descending repeated grades, and a fueling plan you have actually rehearsed. Train the vert and the descents and the eight hour limit gives most committed runners room to finish. The 25K is a friendlier first step if you want the same trails at half the distance.

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.