Rim to River 100 2026
The forecast arrives five days before the start.
Here you'll find the elevation profile, an estimated finish time based on your UTMB Index and details of the 12 aid stations to plan your nutrition and hydration segment by segment.
What's your time based on your UTMB?
Times estimated by the RAVIT model, learned from real ultra-trail finish times. Enter your UTMB Index (utmb.world) to get a personalized estimate.
Cut-off times and crew - Rim to River 100 · 2026
Data from the official race rules, checked for every edition. The race rules prevail. Positions are interpolated along the GPX track and are a guide, not official course marking.
What you'll find at each aid station
| Product | Concho Rimkm 11.5 | Thurmondkm 27.6 | Cunardkm 42.7 | Bike Farmkm 60.9 | Fayette Stationkm 68.9 | Hawks Nestkm 84.4 | Fayette Stationkm 95.1 | Bike Farmkm 103.0 | Arrowheadkm 119.7 | Cunardkm 129.4 | Erskinekm 138.4 | Concho Rimkm 151.3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Water | ✕ | ✕ | ✕ | ✕ | ✕ | ✕ | ✕ | ✕ | ✕ | ✕ | ✕ | ✕ |
| Brand products | ✕ | ✕ | ✕ | ✕ | ✕ | ✕ | ✕ | ✕ | ✕ | ✕ | ✕ | ✕ |
Elevation profile
The course and its aid stations
Other trails worth preparing for
- mines of Spain 100 miler, October162 km · 3,983 m D+ · October 16, 2026
- Ghost Train119 km · 626 m D+ · October 17, 2026
- Uwharrie 100161 km · 4,758 m D+ · October 17, 2026
- Pocatello Round114 km · 5,412 m D+ · October 17, 2026
- Sonoma 100 Mile Sufferfest163 km · 7,140 m D+ · October 17, 2026
- Ghost Train 30hr - 100mi160 km · 996 m D+ · October 17, 2026
- No Business 100 Official Course (Counterclockwise)161 km · 4,830 m D+ · October 23, 2026
- Marysville to Elmwood162 km · 285 m D+ · October 23, 2026
- Island View 100154 km · 6,966 m D+ · October 24, 2026
Sources and method
- Time projection — times by index rest on a Riegel formula adjusted for elevation, calibrated on the previous edition's official results. Peter Riegel (Wikipedia)
- Trail nutrition — hourly targets for carbohydrate, fluid and sodium follow the commonly accepted ultra-endurance guidance. La Clinique du Coureur — Fuelling in trail running
- Course, aid stations and cut-offs — taken from the event's official rules, which prevail in case of any discrepancy. Official site — Rim to River 100
Weather for Rim to River 100
Section-by-section forecasts for Rim to River 100, calculated at the estimated passing time: feels-like temperature, rain or snow, wind and thunderstorms. Three models — AROME (Météo-France), ICON (DWD) and ECMWF IFS — served from the finest to the farthest-reaching.
Forecast, not guaranteed: in the mountains a model describes a grid of several hundred meters, not the slope you're on.
Données météo : Météo-France (AROME), DWD (ICON), ECMWF (IFS) — CC BY 4.0, via Open-Meteo
Frequently asked questions
How many checkpoints?
Rim to River 100 has 13 checkpoints: 12 aid stations and 1 checkpoint with undocumented contents. Details are in the two tables above.
What's the longest segment without aid?
The one leading to Bike Farm: 18.3 km and 526 m elevation gain. That's the one to load up for first.
How do I find the exact location of an aid station?
The Google Maps icon in the “Access” column opens the aid station's location: handy for planning your crew's routes.
What distance and elevation gain?
Rim to River 100 is 163 km long with 3083 m of elevation gain.
How long to finish?
With a UTMB Index of 600 (average runner), the estimated time is around 22h39 for Rim to River 100.
What's the weather forecast?
RAVIT publishes the weather for Rim to River 100 section by section: feels-like temperature, rain or snow, wind and storms, at the estimated passage time. Forecasts come from AROME (Météo-France), ICON (DWD) and ECMWF IFS, refreshed several times a day.
Want to stack the odds in your favor for Rim to River 100?
In 2 minutes, RAVIT generates your complete plan: segment-by-segment time, carbs, water and sodium at every aid station, printable roadbook.
No card required · Instant results