Troublesome Hollow 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 5 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 - Troublesome Hollow 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 | #1 Bristol Turnaroundkm 7.9 | #2 Sart/Finish AREAkm 15.9 | #3 Mendotakm 27.8 | #4 WATER ONLYkm 33.6 | #6 Mendotakm 39.5 |
|---|---|---|---|---|---|
| Water | available | available | available | available | available |
| Brand products | available | available | available | available | available |
La feuille de ton assistance pour Troublesome Hollow 50k · 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
Troublesome Hollow 50k: 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 6h02 to 3h47, and the aid-station stop budget from 0h13 to 0h05. 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 | Cut-off margin |
|---|---|---|---|---|---|---|---|
| 500 | 6h02 | 0h13 | — | 362 g | 4.2 L | 3,019 mg | +3h43 |
| 550 | 5h30 | 0h11 | — | 330 g | 3.8 L | 2,749 mg | +4h15 |
| 600 | 5h00 | 0h09 | — | 300 g | 3.5 L | 2,504 mg | +4h45 |
| 650 | 4h38 | 0h07 | — | 278 g | 3.2 L | 2,313 mg | +5h07 |
| 700 | 4h18 | 0h06 | — | 258 g | 3 L | 2,151 mg | +5h27 |
| 750 | 4h02 | 0h05 | — | 242 g | 2.8 L | 2,015 mg | +5h43 |
| 800 | 3h47 | 0h05 | — | 227 g | 2.7 L | 1,894 mg | +5h58 |
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
Troublesome Hollow 50k is 51 km and 867 m of elevation gain, that's 60 km-effort: category S, among 163 races in 2027. Its time limit of 9 h 45 requires a minimum speed of 5.3 km/h: rank 108 out of 145 of the widest cut-off times in S.
S trails 2027: 45 to 74 km-effort
Similar effort in 2027
- Sonoma Coast Trail Marathon · 60 km-effort
- Salmon Falls 50k · 60 km-effort
- Dam Yeti 55K · 60 km-effort
Other trails worth preparing for
- Coldwater 50k52 km · 1,293 m D+ · November 1, 2026
- New York Marathon42 km · 209 m D+ · November 1, 2026
- Mt Laguna Trail Marathon43 km · 938 m D+ · November 1, 2026
- Tunnel Hill 5081 km · 182 m D+ · November 7, 2026
- Mountain Masochist 5081 km · 2,311 m D+ · November 7, 2026
- Lake Chabot 50K49 km · 1,896 m D+ · November 7, 2026
- Mt. Tam 50k48 km · 2,005 m D+ · November 7, 2026
- Deception Pass 50k50 km · 1,394 m D+ · November 7, 2026
- Red Rock Canyon 50k49 km · 988 m D+ · November 14, 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 — Troublesome Hollow 50k
Weather for Troublesome Hollow 50k
The weather for Troublesome Hollow 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 Troublesome Hollow 50k, hour by hour on the courseFrequently asked questions
How many checkpoints?
Troublesome Hollow 50k has 6 checkpoints: 5 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 Finish: 12.0 km and 225 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?
Troublesome Hollow 50k is 51 km long with 867 m of elevation gain.
How long to finish?
With a UTMB Index of 600 (average runner), the estimated time is around 5h00 for Troublesome Hollow 50k.
What's the weather forecast?
The weather for Troublesome Hollow 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 Troublesome Hollow 50k?
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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