Mammoth Bar 10K 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 2 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 - Mammoth Bar 10K · 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 | Castle Rock Aidkm 3.0 | Castle Rock Aidkm 7.3 |
|---|---|---|
| Water | ✕ | ✕ |
| Brand products | ✕ | ✕ |
Elevation profile
The course and its aid stations
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 — Mammoth Bar 10K
Weather for Mammoth Bar 10K
The weather for Mammoth Bar 10K 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 Mammoth Bar 10K, hour by hour on the courseFrequently asked questions
How many checkpoints?
Mammoth Bar 10K has 3 checkpoints: 2 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 Castle Rock Aid: 4.3 km and 308 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?
Mammoth Bar 10K is 10 km long with 624 m of elevation gain.
How long to finish?
With a UTMB Index of 600 (average runner), the estimated time is around 1h16 for Mammoth Bar 10K.
What's the weather forecast?
The weather for Mammoth Bar 10K 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 Mammoth Bar 10K?
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