Montgomery Village, MD, United States · Saturday, November 7, 2026

Fixed Distance 50 mi

Stone Mill 50 Mile Run

38 days away

80 km Distance

1,050 m Climbing

5.6 Grit · Challenging

39.1768° N, 77.1953° W © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Climbing rate 13 m / km Fast & Flat. This course is relatively flat and fast. Ideal for PB attempts.

Time limit 13 hours 9:45 min/km average. Comfortable. Room to walk the climbs and stop at aid. Tighter than 79% of 50 mi races. Measured against 470 races of the same distance. Cut-off calculator →

Field size ~222 Large. Rarely out of sight of another runner.

DUV results for the 2025 edition (50mi) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, November

Daytime high 12°C

Night low 2°C

Rainfall Mostly dry

Daylight 10 h 21 m of light

Regional 2001-2020 average for November — NASA POWER, grid elevation 121 m. Not a forecast.

Results history

Year	Race	Finishers	Men's winner	Women's winner
2025	50mi	222	Spencer Imbach · 06:58:52	Elena Makarevich · 08:45:47
2024	50mi	194	Patrick Blair · 06:56:21	Niki Cochran · 08:20:47
2023	50mi	171	Marcus Hershberger · 07:05:38	Mikka Kei MacDonald · 08:45:02
2022	50mi	175	Nicolas Crouzier · 07:21:30	Heather Dougherty · 08:29:59
2021	50mi	220	Nicolas Crouzier · 06:56:28	Kristen Kelman · 08:10:44
2020	50mi	167	Paul Jacobs · 06:41:23	Meg Ryan · 08:24:47
2019	50mi	250	Paul Jacobs · 06:51:42	Kristen Serafin · 08:35:57
2018	50mi	244	Mark Hammond · 07:15:00	Erin Hub · 09:03:14
2017	50mi	252	Christopher Roberts · 07:21:41	Helene Dumais · 08:25:02
2016	50mi	211	William Kuper · 07:19:13	Mary Beth Strickler · 08:57:15

The field grew 14% between 2024 (194) and 2025 (222). 25% of the 2025 field were women.

DUV results for the 2025 edition (50mi) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

The Aid Station

Course-specific beta from the community

⛰️ terrain

This is a fast & flat course. Expect fast, runnable sections where rhythm is key.

By UltraHub Expert

👟 gear

With trail terrain, choose a shoe with moderate cushioning for optimal performance.

By UltraHub Expert

Gear for this race

Chosen for 80 km of trail with 1,050 m of ascent.

Trail Running Shoes 80 km of trail — cushioning that is still there in the last quarter.
Race Nutrition 80 km of self-supported fuelling between aid stations.
Hydration Vests Flask capacity for 80 km, without the bounce.
Headlamps A 13 h limit puts you out there after dark.
GPS Watches Battery life first — a 80 km day outlasts most full-GPS modes.

La Sportiva

Prodigio Pro

RunRepeat found the La Sportiva Prodigio Pro to have a secure, locked-in fit due to its premium upper, and also praised the shoe's energetic ride, particularly…

$225 ★★★★★ 4.6

Asics