Rachel Carson Trail Challenge 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 - Rachel Carson Trail Challenge · 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 | Bull Creekkm 12.5 | Agan Parkkm 23.9 | Log Cabinkm 34.9 | Shaffer Runkm 47.0 | Finishkm 58.3 |
|---|---|---|---|---|---|
| Water | ✕ | ✕ | ✕ | ✕ | ✕ |
| Brand products | ✕ | ✕ | ✕ | ✕ | ✕ |
Elevation profile
The course and its aid stations
Rachel Carson Trail Challenge: 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 8h43 to 5h25, and the aid-station stop budget from 0h19 to 0h07. The longer the race, the more stops weigh: this is time you should plan to spend standing still, not only running.
| UTMB® Index | Estimated time | Of which stops | Night hours | Carbs | Fluid | Sodium | Cut-off margin |
|---|---|---|---|---|---|---|---|
| 500 | 8h43 | 0h19 | 2 | 523 g | 6.1 L | 4,360 mg | +7h11 |
| 550 | 7h56 | 0h15 | 2 | 476 g | 5.6 L | 3,969 mg | +7h58 |
| 600 | 7h12 | 0h13 | 2 | 432 g | 5 L | 3,602 mg | +8h42 |
| 650 | 6h42 | 0h11 | 2 | 402 g | 4.7 L | 3,350 mg | +9h12 |
| 700 | 6h11 | 0h09 | 2 | 371 g | 4.3 L | 3,091 mg | +9h43 |
| 750 | 5h48 | 0h08 | 2 | 348 g | 4.1 L | 2,900 mg | +10h06 |
| 800 | 5h25 | 0h07 | 2 | 325 g | 3.8 L | 2,706 mg | +10h29 |
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.
Other trails worth preparing for
- Elk-King 50K48 km · 1,943 m D+ · October 17, 2026
- Rogue Gorge 5081 km · 862 m D+ · October 17, 2026
- Man against horse77 km · 1,910 m D+ · October 17, 2026
- Horseshoe Bend 50 Mile81 km · 1,108 m D+ · October 17, 2026
- Wild Duluth 50K48 km · 1,511 m D+ · October 17, 2026
- Lake Sonoma 5081 km · 2,922 m D+ · October 17, 2026
- Fort Collins - Marathon43 km · 1,162 m D+ · October 18, 2026
- Coldwater 50k52 km · 1,293 m D+ · November 1, 2026
- Tunnel Hill 5081 km · 182 m D+ · November 7, 2026
Sources and method
- Time projection — les temps par cote sont repris des passages réels des coureurs de chaque tranche sur les éditions précédentes de cette course, arrêts aux ravitaillements compris. Aucune formule n'intervient tant que ces résultats existent.
- 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 — Rachel Carson Trail Challenge
Weather for Rachel Carson Trail Challenge
The weather for Rachel Carson Trail Challenge 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 Rachel Carson Trail Challenge, hour by hour on the courseFrequently asked questions
How many checkpoints?
Rachel Carson Trail Challenge has 5 checkpoints: 5 aid stations. Details are in the two tables above.
What's the longest segment without aid?
The one leading to Bull Creek: 12.5 km and 371 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?
Rachel Carson Trail Challenge is 58 km long with 1985 m of elevation gain.
How long to finish?
With a UTMB Index of 600 (average runner), the estimated time is around 7h12 for Rachel Carson Trail Challenge.
What's the weather forecast?
The weather for Rachel Carson Trail Challenge 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 Rachel Carson Trail Challenge?
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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