Course map, elevation profile & surface
Fly the course
Follow the route over 3D terrain, mile by mile.
Race-day light
For a 20:55 finish (an estimate) · starting 7:00 AM Sep 12 · headlamp mi 64–the finish. Dark means the sun below civil twilight.
Climbs
biggest firstElevation gain, measured two ways
| Source | Gain | vs lidar |
|---|---|---|
| Course file (GPX) | 9,478ft | +30% |
| USGS lidar, 1 m | 7,309ft | reference |
They differ because a GPS file picks up noise on every wiggle and often takes its heights from a coarse terrain model, while lidar maps the ground itself to about a metre. We sampled this route every 98 ft against USGS 3DEP and counted each rise of 10 ft or more, on Oct 24, 2026. The planner still uses the course file.
Aid stations as published on the course file
| Aid station | Mile | km |
|---|---|---|
| A unmanned water stop 2 (lap 1) | 2.8 | 4.6 |
| A Reisinger Boat Ramp AS (lap 1) | 7.6 | 12.2 |
| A Twin Bridges AS (lap 1) | 13.7 | 22.1 |
| A Nature Center AS (lap 1) | 20.3 | 32.7 |
| A Little Miami River AS (lap 1) | 25.7 | 41.4 |
| A unmanned water stop (lap 1) | 30.2 | 48.5 |
| A Start/Finish Aid Station (lap 1) | 33.5 | 54.0 |
| A unmanned water stop 2 (lap 2) | 36.4 | 58.6 |
| A Reisinger Boat Ramp AS (lap 2) | 41.1 | 66.2 |
| A Twin Bridges AS (lap 2) | 47.3 | 76.1 |
| A Nature Center AS (lap 2) | 53.9 | 86.8 |
| A Little Miami River AS (lap 2) | 59.3 | 95.4 |
| A unmanned water stop (lap 2) | 63.7 | 102.6 |
| A Start/Finish Aid Station (lap 2) | 67.1 | 108.0 |
| A unmanned water stop 2 (lap 3) | 70.0 | 112.6 |
| A Reisinger Boat Ramp AS (lap 3) | 74.7 | 120.2 |
| A Twin Bridges AS (lap 3) | 80.9 | 130.1 |
| A Nature Center AS (lap 3) | 87.5 | 140.8 |
| A Little Miami River AS (lap 3) | 92.8 | 149.4 |
| A unmanned water stop (lap 3) | 97.3 | 156.6 |
| Start/Finish Aid Station (lap 3) | 100.7 | 162.0 |
Badge colours match the markers on the map above — always confirm locations and cutoffs with the race organizer.
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Conditions typical race-day weather for Sep 12 at the start
Typical = the median of 2016–2025 for Sep 12 ±3 days at the start line; a wet day has 1 mm of rain or more. Historical weather from Open-Meteo.
Race almanac 1 year of this race
Past editions
On race day it reached 79°F at the start, with a low of 68°.
| Year | Start °F | Rain | Wind |
|---|---|---|---|
| 2026 Sep 12 | 79°/68° | 0.41in | 9mph |
race-day weather from the Open-Meteo historical archive (ERA5) at the start line.
Reviews what runners who have been there say
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About this course
East Fork 100 mi/100K/50K/15 mi 100 Miler — 2026 covers 100.8 mi (162.1 km) with 9,478 ft of elevation gain through Ohio, United States. That is about 94 ft per mile of climbing, and 9,459 ft of descent. The course tops out at 899 ft and bottoms out at 636 ft. The surface is 88% trail and 12% paved. There are 20 aid stations on course; the longest stretch between aid is 6.6 mi. Race day is September 12, 2026, starting at 7:00 AM; the sun rises at 7:16 AM and sets at 7:52 PM. Typical race-day weather at the start: a high of 80°F and a low of 61°F, with a 16% chance of a wet day. The interactive map above shows the full route with its elevation profile and aid stations, built from the course's GPS file.
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Course history
- Sep 3, 2026Added to the catalog
Races like this one close in distance, climbing, terrain, altitude, weather and season
- Rim to River 100 100 Miler — 2026Oct · 101 mi · 82 ft/mi · WVSame distance · Mostly trail · Similar climbing
- Tuscazoar Endurance Race 100 Miler — 2026Sep · 99 mi · 76 ft/miSame distance · Similar weather · Same month
- MST 100 Endurance Race 100 Mile102 mi · 72 ft/mi · NCSame distance · Mostly trail · Similar climbing
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