FOURmidable 50k 2027
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 6 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 - FOURmidable 50k · 2027
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 | Gate 142km 8.5 | No Handskm 15.3 | Knickerbockerkm 21.4 | Knickerbockerkm 28.8 | Coolkm 37.4 | No Handskm 43.6 |
|---|---|---|---|---|---|---|
| Water | ✕ | ✕ | ✕ | ✕ | ✕ | ✕ |
| Brand products | ✕ | ✕ | ✕ | ✕ | ✕ | ✕ |
Elevation profile
The course and its aid stations
Other trails worth preparing for
- Elk-King 50K48 km · 1,943 m D+ · October 17, 2026
- Man against horse77 km · 1,910 m D+ · October 17, 2026
- Wild Duluth 50K48 km · 1,511 m D+ · October 17, 2026
- Fort Collins - Marathon43 km · 1,162 m D+ · October 18, 2026
- Javelina Jackass 31k31 km · 322 m D+ · October 31, 2026
- Coldwater 50k52 km · 1,293 m D+ · November 1, 2026
- Lake Chabot 50K49 km · 1,896 m D+ · November 7, 2026
- Mt. Tam 50k48 km · 2,005 m D+ · November 7, 2026
- Red Rock Canyon 50k49 km · 988 m D+ · November 14, 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 — FOURmidable 50k
Weather for FOURmidable 50k
The weather for FOURmidable 50k will appear here as soon as the forecast models reach that date, around five days before the start: feels-like temperature, rain, snow, wind and storms, section by section and at your passage time.
Detailed weather for FOURmidable 50k, hour by hour on the courseFrequently asked questions
How many checkpoints?
FOURmidable 50k has 14 checkpoints: 6 aid stations and 8 checkpoints with undocumented contents. Details are in the two tables above.
What's the longest segment without aid?
The one leading to Cool: 8.7 km and 197 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?
FOURmidable 50k is 50 km long with 1620 m of elevation gain.
How long to finish?
With a UTMB Index of 600 (average runner), the estimated time is around 6h12 for FOURmidable 50k.
What's the weather forecast?
The weather for FOURmidable 50k will be published on this page around five days before the start, once the forecast models reach the race date. It will be detailed section by section: feels-like temperature, rain, snow, wind and storms.
Want to stack the odds in your favor for FOURmidable 50k?
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