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Rock 'N The Knob Course Guide

Rock 'N The Knob Trail Challenge is billed as Pennsylvania's highest trail race, run on Blue Knob, the state's northernmost 3,000-plus-foot peak near Claysburg. Highly technical rocky singletrack, named climbs that do not undersell themselves, and a finish-line beer tasting waiting for you. I will walk you through the course first, then give you a pacing and fueling plan built for the terrain. There are free calculators along the way to dial in your own numbers.

⏵ At a glance

Rock 'N The Knob quick facts

Date
Saturday, September 12, 2026
Location
Blue Knob All-Season Resort, Claysburg, PA, on Blue Knob, Pennsylvania's northernmost 3,000+ ft peak
Distances
50K (marquee), 20 to 25K, and 10K
Elevation gain
50K: roughly 7,000+ ft (sources conflict on the exact figure, so treat this as a general range, not a precise number)
Cutoffs
50K: 11-hour window (6:00 AM to 5:00 PM) · Medium (20 to 25K): 6.5 hours · 10K: 6 hours
Entry
$65 to $99 depending on distance (RunSignUp), closes Sept 8 at noon
Organizer
Allegheny Trail Runners

These facts come from the official race site and RunSignUp. The 50K elevation figure varies by source, so treat it as a general range. Check the current date, cutoffs, and entry details before you commit. Race logistics change year to year.

The course: technical rock from top to bottom

The 50K runs on Blue Knob, Pennsylvania's northernmost 3,000-plus-foot peak, on highly technical, rocky singletrack. Sources are not consistent on the exact 50K elevation figure, so plan on roughly 7,000-plus feet of climbing rather than treating any single published number as precise. What is consistent across every account of this course is the rock underfoot.

The named climbs: Throat Punch Hill and I Need a Sherpa

The course has named grades, and they earn their names. Throat Punch Hill runs at roughly a 27 percent grade, and I Need a Sherpa steepens to roughly 40 percent. These are hike-not-run sections for almost everyone, and trying to run them anyway is a fast way to blow up your legs early. Add in Devils Hairpin and Soul Sucker Slopes, and the pattern for the day is clear: short, brutal pitches, not one long sustained climb.

Hike these efficiently and save your running legs for the more moderate stretches between them. Racing the named climbs against the clock rarely pays off here.

Rock underfoot, the whole way

This is not a course with a few rocky sections and otherwise smooth trail. The footing is technical throughout, on the climbs and the descents both, and the 10K alone has been ranked the toughest 10K in Pennsylvania by Trails Collective. Quick feet and constant attention are as important as fitness. A moment of distraction on the rock costs you more time than a slightly slower pace ever would.

The finish: food, beer, and a well-earned stop

Post-race food and a beer tasting wait at the finish, which is a nice reward after a day on rock this consistent. Pace yourself so you actually get to enjoy it instead of limping in at the last minute with nothing left. The 11-hour window for the 50K is generous enough for most trained trail runners, but the terrain makes every mile cost more than it looks like on paper.

Pacing strategy for a technical, rocky 50K

With named climbs this steep and rock underfoot the entire way, Rock 'N The Knob is about effort and footing, not a pace chart built for smooth trail.

Pace by grade on Throat Punch Hill and I Need a Sherpa

Grades in the 27 to 40 percent range are hiking terrain for almost every runner, no matter your fitness. A grade-adjusted pace target turns your real fitness into an honest number for these named climbs, so you know going in that hiking them is the fast way, not the slow way.

Build a finish window that respects the rock, not just the vert

Because the elevation figure for this course is imprecise and the technical footing slows your net pace beyond what the vert alone predicts, a straight vert-aware finish prediction is a starting point, not a guarantee. Build in extra margin for the rock, and check your projected splits against the 11-hour window with the ultra cutoff calculator before you commit to an aggressive pace.

⏵ Free tools to pace this course

Fueling strategy for a slow, technical day

Technical footing means more time on course than the raw distance or vert suggests, so fuel by time out there, not by mileage alone.

Carbs: plan around time, not just miles

Aim for 60 to 90 grams of carbohydrate per hour, and remember that the rocky footing on Blue Knob slows your net pace, so your time on course will likely run longer than a similar distance on smoother trail. Build your fueling plan around your expected time out there, not just the 50K distance on paper.

Sodium and fluid: scale to the mid-September heat

Sodium in the 300 to 700 mg per liter range works for most runners, and mid-September in Pennsylvania can still bring a genuinely warm day, so lean toward the higher end if the forecast runs hot. The steep named climbs add real effort spikes on top of the heat, so drink on a schedule through those sections instead of waiting until you feel thirsty at the top.

⏵ Build your fueling plan

Get a carb, sodium, fluid, and caffeine plan per hour built for your weight, your goal time, and Blue Knob's heat with the free ultra fueling calculator. Browse the rest of the free running tools at the tools hub.

⏵ Free calculators for this race

Run your Rock 'N The Knob numbers with our free, no-signup tools, then let Summit Line tie them back to your real fitness and this exact course.

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⏵ Train for it with Summit Line

Get a race-day plan built around YOUR fitness, this exact climbing profile, and your projected splits. Summit Line reads your real training, builds a plan for the technical grades, and rehearses your fueling so race day is something you execute, not guess at.

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Rock 'N The Knob FAQ

How hard is Rock 'N The Knob?

Rock 'N The Knob is billed as Pennsylvania's highest trail race, run on Blue Knob, the state's northernmost 3,000-plus-foot peak, and it lives up to that billing. The 50K climbs and descends highly technical, rocky singletrack, with named grades like Throat Punch Hill and I Need a Sherpa that tell you exactly what the organizers think of them. The exact elevation figure for the 50K is imprecise across sources, somewhere north of 7,000 feet, but the number matters less here than the terrain. This is rock underfoot from start to finish, and it slows you down more than the vert alone would suggest.

How much climbing is in the Rock 'N The Knob 50K?

Sources are not consistent on the exact 50K elevation figure, and I would rather tell you that honestly than hand you a precise-looking number that is not reliable. Plan on roughly 7,000-plus feet across the 50K, delivered through named climbs like Throat Punch Hill, at around a 27 percent grade, and I Need a Sherpa, at around 40 percent, plus Devils Hairpin and Soul Sucker Slopes. Confirm the current course profile on the official site before you build a detailed pacing plan around a specific number.

What are the cutoff times for Rock 'N The Knob?

The 50K runs on an 11-hour window, 6:00 AM to 5:00 PM. The medium distance, 20 to 25K depending on the year, has a 6.5-hour cutoff, and the 10K has a 6-hour cutoff. These are overall time limits rather than staged checkpoint cutoffs, so pace your day against the finish-line clock and leave yourself margin for how much the rocky footing slows a tired runner late in the race.

How should I fuel for Rock ’N The Knob?

Treat the 50K as a multi-hour effort where technical footing slows your net pace more than the raw vert suggests, so plan your fueling around time on course, not just distance. Most runners do well on roughly 60 to 90 grams of carbohydrate per hour, and sodium in the 300 to 700 mg per liter range, scaled up if the mid-September weather runs warm. Post-race food and a beer tasting wait at the finish, so you do not need to carry extra for the walk back to the car.

What is the terrain like at Blue Knob?

Highly technical rocky singletrack defines this course, with named sections that are not exaggerating: Throat Punch Hill at roughly a 27 percent grade, I Need a Sherpa at roughly 40 percent, plus Devils Hairpin and Soul Sucker Slopes. The 10K alone has been ranked the toughest 10K in Pennsylvania by Trails Collective, which tells you the shorter distances are not an easy alternative here. Expect rock underfoot constantly, not just on the named climbs.

Has Rock 'N The Knob run every year?

Rock 'N The Knob returned for its 14th annual running in 2026 after a gap year, so it has a long history at Blue Knob but not an unbroken one. Check the current year's race page for the latest course notes and any changes, since a race with a gap in its history is more likely to have small logistics changes than one that has run every single year without interruption.

This guide is independent and for planning only. The course details, dates, cutoffs, and elevation figures come from public sources, some of which disagree with each other, 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.