Falling Water 100k 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 8 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 - Falling Water 100k · 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 | Water Station 1km 8.1 | Water Station 2km 16.1 | Water Station 1km 32.4 | Water Station 2km 40.4 | Water Station 1km 56.6 | Water Station 2km 64.7 | Water Station 1km 80.9 | Water Station 2km 89.0 |
|---|---|---|---|---|---|---|---|---|
| Water | available | available | available | available | available | available | available | available |
La feuille de ton assistance pour Falling Water 100k · 2027
Les règles d'assistance de cette course ne sont pas encore connues : tu marqueras tes rendez-vous toi-même.
Recto, verso et planche d'étiquettes, en PDF : l'exemple d'une coureuse de l'UTMB.
Elevation profile
The course and its aid stations
Falling Water 100k: times, aid-station stops and fuelling needs by UTMB® Index
Between a UTMB® Index of 500 and 800, the estimated finish time on this race runs from 16h07 to 9h25, and the aid-station stop budget from 0h55 to 0h18. The longer the race, the more stops weigh: this is time you should plan to spend standing still, not only running.
Source
| UTMB® Index | Estimated time | Of which stops | Night hours | Carbs | Fluid | Sodium |
|---|---|---|---|---|---|---|
| 500 | 16h07 | 0h55 | 3.1 | 967 g | 11.3 L | 8,061 mg |
| 550 | 14h40 | 0h44 | 1.7 | 880 g | 10.3 L | 7,331 mg |
| 600 | 13h04 | 0h35 | 0.1 | 784 g | 9.1 L | 6,533 mg |
| 650 | 11h58 | 0h29 | — | 718 g | 8.4 L | 5,984 mg |
| 700 | 11h00 | 0h25 | — | 660 g | 7.7 L | 5,499 mg |
| 750 | 10h09 | 0h21 | — | 609 g | 7.1 L | 5,072 mg |
| 800 | 9h25 | 0h18 | — | 565 g | 6.6 L | 4,712 mg |
Figures based on 60 g of carbohydrate, 700 mL of fluid and 500 mg of sodium per hour, "average" preparation and mild conditions (15–25 °C). Above 25 °C, count on roughly 900 mL/h and 700 mg/h. Carbohydrate intake is trained: 60 g/h is a floor, 90 g/h assumes a glucose-fructose blend and a gut used to it.
In the 2027 ranking
Falling Water 100k is 97 km and 3,244 m of elevation gain, that's 129 km-effort: category L, among 87 races in 2027. Its time limit is not yet published: minimum speed unknown.
L ultra-trails 2027: 115 to 154 km-effort
Similar effort in 2027
- Trail Verbier St Bernard - X-Traversee · 129 km-effort
- Zugspitz Ultra Trail - Ehrwald Trail · 130 km-effort
- Leona Divide 100k · 129 km-effort
Other trails worth preparing for
- Javelina 100k97 km · 1,053 m D+ · October 31, 2026
- Tunnel Hill 5081 km · 182 m D+ · November 7, 2026
- Mountain Masochist 100k101 km · 3,268 m D+ · November 7, 2026
- Mountain Masochist 5081 km · 2,311 m D+ · November 7, 2026
- Looking Glass 100K98 km · 3,190 m D+ · November 14, 2026
- Pass Mountain 50 Mile81 km · 1,602 m D+ · November 14, 2026
- Jackson County Ultras100 km · 2,491 m D+ · December 5, 2026
- Devil Dog Ultra 100k100 km · 1,820 m D+ · December 5, 2026
- Spirit of Syllamo 100152 km · 5,023 m D+ · December 12, 2026
Sources and method
- Time projection — times by UTMB Index are taken from the actual splits of runners in each level band on previous editions of this race, aid station stops included. No formula is used as long as these results exist.
- 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 — Falling Water 100k
Weather for Falling Water 100k
The weather for Falling Water 100k 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 Falling Water 100k, hour by hour on the courseFrequently asked questions
How many checkpoints?
Falling Water 100k has 12 checkpoints: 8 water points and 4 checkpoints with undocumented contents. Details are in the two tables above.
What's the longest segment without aid?
The one leading to Water Station 1: 16.3 km and 567 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?
Falling Water 100k is 97 km long with 3244 m of elevation gain.
How long to finish?
With a UTMB Index of 600 (average runner), the estimated time is around 13h04 for Falling Water 100k.
What's the weather forecast?
The weather for Falling Water 100k 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 Falling Water 100k?
In 2 minutes, RAVIT generates your complete plan: segment-by-segment time, carbs, water and sodium at every aid station, printable roadbook.
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