⏵ Course guide · Salem Lake, Winston-Salem, North Carolina
The Frosty Fifty runs a wide, rolling dirt loop around Salem Lake in Winston-Salem, North Carolina, with 50K, 25K, and 12.5K options built from the same USATF-certified 12.5K loop. I will walk you through the course and the 7-hour 50K cutoff, then give you a pacing and fueling plan with free calculators to dial in your own numbers.
These facts come from the official RunSignup event page. Check the current year details before you commit. Race logistics can change year to year.
Every distance here is built from the same USATF-certified 12.5K loop around Salem Lake: the 12.5K is 1 loop, the 25K is 2, and the 50K is 4.
The course runs on wide rolling dirt trail around Salem Lake, which keeps footing straightforward compared to technical single-track. That makes the Frosty Fifty a good venue to focus on pacing and fueling execution rather than fighting the terrain itself.
True to the name, this is a January race, so cold starts and variable Piedmont North Carolina winter weather are real factors even though the course itself is not technically demanding. Dress in layers you can shed as the loop warms you up.
The Gwyn's Grace 50K Relay splits the 50K into four 12.5K legs across a team, a good way to experience the full course and event atmosphere without committing to the individual 50K cutoff.
A 7-hour 50K cutoff works out to roughly 13:30 per mile average, which is achievable for most trained ultra runners but leaves less margin than a longer cutoff would.
Because the 50K repeats the same 12.5K loop 4 times, your first-loop split is a direct, honest preview of what 4 loops at that pace will cost you. Aim for even, repeatable splits rather than a fast first loop you cannot sustain.
⏵ Free tools to plan your effort
Cold January mornings can blunt thirst cues even as you sweat under layers, so deliberate fueling and hydration matter more here than the temperature alone might suggest.
Aim for roughly 60 to 90 grams of carbohydrate per hour and sodium in the 300 to 700 mg per liter range across the 50K, adjusted down slightly if you are running comfortably in cool temperatures with less sweat loss than a warm-weather race. Since you pass the start/finish area every 12.5K, use that as your natural fueling checkpoint.
⏵ Build your fueling plan
Get a carb, sodium, fluid, and caffeine plan per hour built for your weight, your goal time, and cold-weather 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 training plan built around YOUR fitness and the 7-hour cutoff at the Frosty Fifty. Summit Line reads your real training, builds the repeatable loop pace this course demands, and rehearses your fueling so race day is something you execute, not guess at.
The 50K is a wide, rolling dirt trail run around Salem Lake, run as 4 loops of the same 12.5K course. It is not a technical mountain course, but January weather and 31 miles of repeated terrain are real factors, and the 7-hour cutoff, an average pace just under 13:30 per mile, is achievable for a well-prepared runner but not a huge cushion if you have a rough patch.
The 50K carries a 7-hour time cap. With an 8:00 AM start, that puts the cutoff at roughly 3:00 PM. Pace your first couple of loops conservatively so you have margin left for the final loop if conditions or your legs turn tougher than expected.
No. Registration closes at 11:59 PM on Tuesday, January 5, 2027, and the official page states plainly there is no race-day registration. Register well ahead of that deadline if you want to run.
No, it is a repeated 12.5K loop around Salem Lake: the 12.5K is 1 loop, the 25K is 2 loops, and the 50K is 4 loops. The course is USATF-certified (NC23001DF), so the distance is measured and consistent lap to lap.
It is a 4-person team option covering the same 50K distance as the individual race, with each teammate running one 12.5K leg. It is a good way to experience the Salem Lake course and event atmosphere without committing to the full solo 50K, or a fun team option if you are training partners with three others.
The wide, rolling dirt trail and the loop format make this a forgiving course to attempt a first 50K on: you pass through the start/finish area every 12.5K, which simplifies gear, fueling, and mental checkpoints compared to a point-to-point ultra. The 7-hour cutoff requires genuine fitness, so build real long-run volume before race day, but the terrain itself will not be the limiting factor for most first-time ultra runners.
The confirmed next edition runs Saturday, January 9, 2027, with the main 12.5K/25K/50K/Relay field starting at 8:00 AM and a separate 5K night race the evening before, Friday, January 8, 2027 at 5:30 PM.
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<a href="https://runsummitline.com/guides/salem-lakeshore-frosty-fifty">The Salem Lakeshore Frosty Fifty course guide</a><iframe src="https://runsummitline.com/embed/race/salem-lakeshore-frosty-fifty" style="width:100%;max-width:420px;height:180px;border:0;" loading="lazy" title="Salem Lakeshore Frosty Fifty course guide by Summit Line"></iframe>This guide is independent and for planning only. The format, date, and course 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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