Ultra Running Hub Montgomery Village, MD, United States · Saturday, November 7, 2026
Fixed Distance 50 mi
Stone Mill 50 Mile Run
52 days away
80 km Distance
1,050 m Climbing
5.6 Grit · Challenging
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 455 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.
The Aid Station
Course-specific beta from the community
This is a fast & flat course. Expect fast, runnable sections where rhythm is key.
With trail terrain, choose a shoe with moderate cushioning for optimal performance.
Gear for this race
Chosen for 80 km of trail with 1,050 m of ascent.
- Trail Running Shoes80 km of trail — cushioning that is still there in the last quarter.
- Race Nutrition80 km of self-supported fuelling between aid stations.
- Hydration VestsFlask capacity for 80 km, without the bounce.
- HeadlampsA 13 h limit puts you out there after dark.
- GPS WatchesBattery life first — a 80 km day outlasts most full-GPS modes.
Course Notes
Event starting and ending in and around the Seneca Greenway Trails, Seneca Ridge and muddy branch trail.
Similar races
Other 50 mi trail ultras, closest in distance first.