⏵ Course guide · East Tennessee ultra
Norris Ultra Dam Hard Trail Race sends its 25K and 50K fields across single track and jeep roads through Norris Dam State Park and the Norris Municipal Watershed near Rocky Top, Tennessee, with a real, enforced halfway checkpoint rule on the 50K. I will walk you through the course and its cutoffs first, then give you a pacing and fueling plan built for a two-loop East Tennessee fundraiser. There are free calculators along the way to dial in your own numbers.
These facts come from the official RunSignup event page. Check the current year details, cutoffs, and aid stations before you commit. Race logistics change year to year.
Both distances share the exact same loop, single track trail mixed with jeep roads across Norris Dam State Park and the adjoining Norris Municipal Watershed. The 25K runs it once, the 50K runs it twice, starting and finishing at the pavilion near the Tea Room.
Expect a genuine mix of terrain: technical single track sections through the state park and watershed, connected by wider jeep road stretches that let you open up your pace a bit before the trail narrows again. That variety keeps the course interesting but also means your rhythm will get interrupted repeatedly rather than settling into one steady gear for miles at a time.
The race notes that its multiple aid stations are easily accessible by road for spectators and crew, a nice logistical detail if you want support along the way. That accessibility also tends to mean well-stocked, easy-to-reach stations rather than remote, hard-to-service ones.
Norris Dam State Park has two campgrounds with water and electric hookups and dump stations, plus rustic cabins. If Rocky Top is a longer drive for you, staying at the park the night before turns race morning into a short walk to the start rather than an early wake-up call.
The 50K's enforced halfway rule, reach the checkpoint and leave it within 4 hours or you are done, changes how you should pace loop one. This is not a race where a cushion-building early loop and a slow recovery second loop works.
With a 9 hour overall limit but a hard 4 hour deadline to clear the halfway aid station and leave it again, your first loop effectively has its own tighter budget. Use a grade-adjusted pace approach on the single track sections to set an honest target, and treat clearing that halfway checkpoint with real time to spare, not just barely, as your first goal of the day.
Because the 50K repeats the identical loop, an aggressive first lap borrows directly from what you need for the second. Build a finish-time estimate around a pace you can genuinely repeat twice, not just survive once, and check that projection against both the 4 hour halfway deadline and the 9 hour overall cutoff.
⏵ Free tools to pace this course
Mid-November in East Tennessee typically brings cool, crisp racing conditions, favorable for both distances, so fueling demands stay moderate compared to a hot-weather ultra.
For the 25K's single loop and 4 hour 40 minute limit, a straightforward plan of 30 to 60 grams of carbohydrate per hour and steady water intake covers most runners.
For the 50K, aim for roughly 60 to 90 grams of carbohydrate per hour and sodium in the 300 to 700 mg per liter range. Use the road-accessible aid stations on both loops to restock consistently, and resist the urge to under-fuel on loop one just because the cool weather makes you feel like you need less. The second loop, and the halfway deadline before it, will punish an empty tank.
⏵ Build your fueling plan
Get a carb, sodium, fluid, and caffeine plan per hour built for your weight, your goal time, and a cool November day 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 two-loop course profile, and your projected halfway split. Summit Line reads your real training, builds a plan for the enforced checkpoint deadline, and rehearses your fueling so race day is something you execute, not guess at.
The name is a fair warning: this is single track and jeep road terrain across Norris Dam State Park and the Norris Municipal Watershed, real East Tennessee trail rather than a groomed park path. The 50K repeats the identical loop the 25K runs once, and the race enforces a genuine mid-race checkpoint rule, reach the halfway aid station and leave it within 4 hours or you do not get to go back out for loop two. That built-in accountability is a strong signal the course and the 9 hour cutoff are honest about how much effort this terrain demands.
Both distances share the same loop, mixing single track trail with jeep roads across Norris Dam State Park and the adjoining Norris Municipal Watershed. The 25K covers it once, the 50K twice. No specific elevation figure is published, but this is East Tennessee terrain in the shadow of the Cumberland Mountains, so expect rolling, wooded trail rather than flat, fast running.
Mid-November in East Tennessee usually brings cool, crisp conditions, well-suited to trail racing. For the 25K, a simple plan of 30 to 60 grams of carbohydrate per hour covers most runners. For the 50K, given the 9 hour time limit and two full loops, aim for roughly 60 to 90 grams of carbohydrate per hour and sodium in the 300 to 700 mg per liter range. Use the multiple aid stations, all easily road-accessible, to restock rather than carrying everything from the start. Build your full numbers with the free ultra fueling calculator before race day.
The 25K carries a 4 hour 40 minute time limit. The 50K gets 9 hours overall, but with a real teeth-in-it intermediate rule: you must reach the halfway aid station and then leave that same aid station within 4 hours of your start, or you are not allowed back out for the second loop. That means the first half effectively has its own tighter, enforced deadline within the larger 9 hour window, so do not bank on a slow first loop and a fast second one to make up time.
Both the 25K and 50K start and finish at the pavilion near the Tea Room in Norris Dam State Park, close to Rocky Top, Tennessee. The park also offers two campgrounds with water and electric hookups plus rustic cabins, so camping on-site the night before is a realistic option if you want to avoid a race-morning drive.
The 25K, with its 4 hour 40 minute limit and single-loop simplicity, is a reasonable first-ultra-adjacent distance if you have solid trail experience. The 50K is more demanding, both because of the two-loop structure and because of the enforced halfway checkpoint rule, which punishes a too-slow first loop more directly than many races do. Whichever distance you choose, know that proceeds support Legacy Parks Foundation, a regional parks nonprofit, so your entry fee does real good beyond your own race day.
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<a href="https://runsummitline.com/guides/norris-dam-hard-50k">The Norris Ultra Dam Hard Trail Race course guide</a><iframe src="https://runsummitline.com/embed/race/norris-dam-hard-50k" style="width:100%;max-width:420px;height:180px;border:0;" loading="lazy" title="Norris Ultra Dam Hard Trail Race course guide by Summit Line"></iframe>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.
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