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⏵ Course guide · North Carolina ultra

Hellbender 100 Course Guide

The Hellbender 100 is one of the most scenic and most punishing 100 milers on the East Coast, a relentless tour of the Black Mountains out of Camp Grier in Old Fort, North Carolina. You get roughly 20,000 feet of climbing on steep, technical Appalachian singletrack, big views from Graybeard Mountain across to Mt. Mitchell, a long night out there, and a clock that does not give you much slack. I will walk you through the course, then give you pacing and fueling strategy built for this exact kind of grind, plus free tools to dial in your own numbers.

⏵ Quick facts

Hellbender 100 at a glance

Date
Fri, May 8, 2026 (5:00 AM start)
Location
Camp Grier, Old Fort, NC (Black Mountains / Pisgah)
Distance
About 100 to 102 miles (mostly trail, some gravel and road)
Elevation gain
About 20,000+ ft of climb (roughly 40,000 ft of total change)
High point
Graybeard Mountain, 5,408 ft (start and finish near 1,500 ft)
Time limit
About 39 hours, with enforced aid-station cutoffs
Aid
10 staffed aid stations plus self-serve water stops
Qualifier
Hardrock 100 and Western States 100 qualifier

Note: Hurricane Helene heavily damaged the original course, so the 2026 edition runs an alternative route and the exact mileage, vert, and cutoffs can shift year to year. Before you plan your race, confirm the current date, course, aid stations, cutoffs, and entry standards on the official Hellbender 100 site.

The course: where Hellbender is won and lost

Hellbender loops through the rugged Black Mountains around Old Fort, starting and finishing at Camp Grier near 1,500 feet. The 2026 course is about 100 to 102 miles, mostly steep technical singletrack with some gravel forest road and short road connectors, and it stacks up roughly 20,000 feet of climbing and the same in descent. The high point is 5,408 feet on Graybeard Mountain, which stares straight across at Mt. Mitchell. There is no easy stretch here. You are almost always going up or down.

Relentless vert on technical trail

The thing that defines Hellbender is not one famous climb, it is the relentlessness. You get a series of big climbs, several of 3,000 feet or more, and the terrain between them rarely gives you flat, easy running to recover on. A lot of it is steep, rooty, rocky Appalachian singletrack that demands attention with every step. That is slow trail, and your flat-ground pace means very little out here.

Treat the climbs as power-hiking, not running. The runners who do well move efficiently uphill, keep their effort even, and save their legs instead of attacking early grades that feel easy on fresh quads. Burn matches on the first big climbs and the back half of this race will collect the debt with interest.

The descents will decide your finish

Hellbender gives back every foot it makes you climb, and the descents are where a lot of days quietly fall apart. Long, steep, technical downhill on rock and root chews up quads fast, and if you let gravity hammer you early, the later descents turn into a slow, painful pick-down in the dark. Controlled, durable descending is a skill, and on this course it matters as much as your climbing fitness.

Train it on purpose. Get on steep technical trail and practice running downhill light and in control, late in long runs when your legs are already tired. Being able to keep moving downhill at mile 80, when your quads are wrecked and you are picking through roots by headlamp, is honestly what separates finishers from DNFs here.

The night, the weather, and the high country

Almost everyone is out here through the night, and the Black Mountains do not coddle you after dark. Up high it can turn cold, wet, foggy, and windy even in May, especially around the high points like Graybeard, while it can still feel mild down at Camp Grier. That swing is why the race requires a headlamp and backup light, a weatherproof jacket, insulating layers, and an emergency bivy. Carry the gear, and actually put it on before you get cold, not after.

The night is also where fueling and focus slip. Your appetite fades, the technical footing gets harder to read by headlamp, and the cutoffs keep ticking. Plan for the low points in advance, keep eating on a schedule, and know that almost everyone comes back to life once the sun comes up, if they kept themselves fed and warm through the dark.

Aid stations, crew, pacers, and drop bags

The 2026 course has around 10 staffed aid stations plus a handful of self-serve water stops, and it runs cupless, so you carry your own cup or soft flask. Crew access is limited to specific aid stations, drop bags are allowed at designated stops, and pacers are permitted at certain points later in the race, so map out exactly where you will see your people and what goes in each drop bag before race day.

Because aid is spread across slow mountain miles, the gaps between stations eat more time than the distance suggests. Carry enough fluid, calories, and layers to be self-sufficient between stops, and do not count on the next aid being close. Confirm the current crew, pacer, and drop-bag rules with the race, since access points can change with the course.

Pacing strategy for a relentless-vert 100

With about 20,000 feet of climbing and the same in descent on slow technical trail, Hellbender is about managing effort over a very long day, not hitting a pace chart. Run the climbs by feel, protect your quads on the descents, and keep margin on the cutoffs.

Pace the climbs by grade, not by the watch

Your flat-ground splits are useless on Hellbender. What matters is grade-adjusted effort: hold a steady output you can sustain up the grade, and power-hike the steep pitches without feeling like you are giving anything up. The classic mistake is running the early climbs hard because the legs feel good, then paying for it on the descents and overnight. Use a grade-adjusted pace to turn your real fitness into honest climbing and descending targets, and you will not cook the first half.

Build a vert-aware finish prediction

Do not guess your Hellbender finish off a road 100 or a flatter trail race. The 20,000 feet of climb, the technical footing, and the night all add big time, and on terrain this slow that adjustment is huge. A vert-aware finish prediction that accounts for this course profile gives you a realistic window and lets you work backward into the enforced aid-station cutoffs, so you actually know how much buffer you have at each one instead of hoping.

Run the cutoffs, not just the miles

On a course this slow, the mid-race cutoffs bite harder than the overall average pace makes them look, especially overnight when your pace drops. Build your plan around leaving each aid station with margin, not arriving right on the line, because the cutoffs go off your departure time and time on your feet at the station counts against you. Reality-check your goal against a recent race before you commit, so your splits are built on what you can actually hold over 100 mountain miles.

⏵ Free tools to pace this course

Fueling strategy for a long mountain night

Most runners are out on Hellbender well over a day, much of it climbing and a big chunk of it in the dark. That makes carbohydrate, sodium, and fluid just as decisive as fitness, and the night is where most fueling plans fall apart.

Carbs: steady, trained, and never zero

For an effort this long, target roughly 60 to 90 grams of carbohydrate per hour, leaning toward the high end if your gut is trained for it, and use a glucose-plus-fructose mix so you can actually absorb it. The danger on a 100 is not one bad hour, it is letting your intake quietly drift to nothing on the long climbs and through the night until you bonk at 2 AM. Keep eating on a schedule, even when you do not feel like it, and rehearse your exact hourly number on long back-to-back days so it feels routine on race day.

Sodium and fluid: cover the long gaps

Bias your sodium toward 500 to 700 mg per liter of fluid, and higher if you sweat heavy or salty. May in the mountains is usually cooler than a summer race, so your total fluid need may be a bit lower, but the gaps between aid are long and slow, so still carry enough to get yourself across them with margin. Cramping, a sloshy stomach, and that hollow late-race emptiness are usually fueling and sodium problems, not fitness problems, so weigh yourself before and after a long training day to learn 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 Hellbender night 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 Hellbender course profile, and your projected splits. Summit Line reads your real training, builds a plan for the relentless vert and the technical descents, and rehearses your fueling for the long night, so race day is something you execute, not guess at.

Start free →Explore the demo

Hellbender 100 FAQ

How hard is the Hellbender 100?

Hellbender is one of the harder 100 milers on the East Coast, and it earns the name. The 2026 course runs about 100 to 102 miles out of Camp Grier in Old Fort with roughly 20,000 feet of climb and the same coming back down, which is around 40,000 feet of total elevation change packed into rugged Black Mountains terrain. The footing is the real story: long stretches of steep, rooty, rocky Appalachian singletrack that never lets you settle into a rhythm. Add a tight clock (about 39 hours with enforced aid-station cutoffs), a full night out there, and mountain weather that can turn cold and wet up high, and you have a genuinely demanding day. It is a Hardrock and Western States qualifier for a reason.

How much climbing is in the Hellbender 100?

The 2026 alternative course has about 20,000 feet of climbing and about 20,000 feet of descent, so roughly 40,000 feet of total elevation change across the day. You get a handful of big climbs, several of 3,000 feet or more, on technical mountain trail. The high point is 5,408 feet on top of Graybeard Mountain, which looks across at Mt. Mitchell, and you start and finish down near 1,500 feet, so almost everything is either up or down. The race made its name on an even bigger original course that summited Mt. Mitchell with up to about 48,000 feet of change, before Hurricane Helene forced a reroute, so always check which course is in play for the year you run.

How should I fuel for the Hellbender 100?

You are fueling a long, vert-heavy day that for most people runs well over 24 hours, so eat early and keep eating. Target roughly 60 to 90 grams of carbohydrate per hour, leaning to the high end if your gut is trained, and do not let the climbs and the night quietly stall your intake. Sodium matters too, often around 500 to 700 mg per liter of fluid, more if you sweat heavy or salty, and you may need a little less fluid than a hot-weather race but should still carry enough to cover the long gaps between aid. The classic 100 mile failure is an empty tank at 2 AM, so rehearse your hourly numbers on long back-to-back training days. Our free ultra fueling calculator turns your weight, goal time, and conditions into a carb, sodium, and fluid plan per hour.

What are the Hellbender 100 cutoffs?

The overall time limit is about 39 hours from the Friday morning start, and the aid-station cutoffs along the way are enforced, so you cannot bank all your buffer for the end. The cutoffs go off the time you LEAVE an aid station, not when you arrive, which catches people who sit too long. Because the terrain is so slow, those mid-race cutoffs are tighter than the raw average pace makes them look, especially overnight. Pull the official cutoff chart for the current edition and build your splits backward from each one with real margin. Confirm the exact times with the race before you start, because the course and cutoffs can shift year to year.

What is the terrain and weather like at Hellbender?

Most of the course is mountain singletrack, a mix of soft dirt and very technical rock and root, with some gravel forest road and a few road connectors stitching it together. This is classic Western North Carolina Appalachian trail, steep and rugged, and it rewards strong hiking and careful, durable descending far more than flat-ground speed. Early May in the Black Mountains can be almost anything: mild and pleasant down low, then cold, wind, fog, and rain up high, especially overnight near the high points. The race requires real gear for a reason, including a headlamp and backup light, a weatherproof jacket, insulating layers, and an emergency bivy, so pack for a cold night out and respect the mountain.

Is the Hellbender 100 a good first 100 miler?

It can be a great goal 100, but it is a tough place to attempt your first one. The relentless vert, the technical footing, the long night, and the enforced cutoffs all ask for specific preparation, not just big miles. If you are going to make Hellbender your first hundred, build serious time on steep technical trail, practice long power-hiking climbs and controlled descents, rehearse eating and drinking through the night, and have a crew and pacer plan dialed for the points where they are allowed. Prepared and patient runners finish, but this is not a forgiving introduction to the distance, so go in with the respect it deserves.

This guide is independent and for planning and training only, and it reflects publicly available information about the Hellbender 100. Race details, including the date, course, mileage, vert, aid stations, cutoffs, gear rules, and entry standards, can change year to year, especially while the course recovers from Hurricane Helene. So always confirm the current specifics on the official Hellbender 100 website before you register, train, or travel. The fueling and pacing advice is general and not medical advice.