Desert RATS Trail Running Festival - 21K 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 4 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.
Predicted race time based on your UTMB Index® · smoothed times achieved by runners at your level in past editions
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Cut-off times and crew - Desert RATS Trail Running Festival - 21K · 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 | Crossroadskm 2.8 | Pizza Overlookkm 5.2 | Moore Funkm 11.8 | Finishkm 21.4 |
|---|---|---|---|---|
| Water | available | available | available | available |
| Brand products · Näak | available | available | available | available |
Elevation profile
The course and its aid stations
Desert RATS Trail Running Festival - 21K: 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 2h19 to 1h26. These times include aid-station stops: they come from real durations between two timing points, and this race's timing does not measure stops separately.
Source| UTMB® Index | Estimated time | Night hours | Carbs | Fluid | Sodium | Cut-off margin |
|---|---|---|---|---|---|---|
| 500 | 2h19 | — | 139 g | 1.6 L | 1,158 mg | +2h41 |
| 550 | 2h01 | — | 121 g | 1.4 L | 1,008 mg | +2h59 |
| 600 | 1h54 | — | 114 g | 1.3 L | 950 mg | +3h06 |
| 650 | 1h43 | — | 103 g | 1.2 L | 858 mg | +3h17 |
| 700 | 1h36 | — | 96 g | 1.1 L | 800 mg | +3h24 |
| 750 | 1h32 | — | 92 g | 1.1 L | 767 mg | +3h28 |
| 800 | 1h26 | — | 86 g | 1 L | 717 mg | +3h34 |
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.
Edition 2026 measurements
Edition 2026 measured 20.1 km, vs 21.4 km for this one: its times aren't included here.
See segment-by-segment analysis of Desert RATS Trail Running Festival - 21KOther trails worth preparing for
- Javelina Jackass 31k31 km · 322 m D+ · October 31, 2026
- Coldwater Trail 25k25 km · 619 m D+ · November 1, 2026
- Rim Rock Half21 km · 21 m D+ · November 1, 2026
- HOKA Pacific Trails California by UTMB - 25K®25 km · 667 m D+ · November 15, 2026
- Lost Lake 25K25 km · 954 m D+ · March 6, 2027
- The Canyons Endurance Runs - 25K25 km · 810 m D+ · April 23, 2027
- Rothrock - 25K27 km · 1,065 m D+ · May 16, 2027
- Sonoma Coast Half Marathon21 km · 895 m D+ · May 29, 2027
- Sonoma Coast 30K30 km · 1,331 m D+ · May 29, 2027
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 — Desert RATS Trail Running Festival - 21K
Weather for Desert RATS Trail Running Festival - 21K
The weather for Desert RATS Trail Running Festival - 21K 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 Desert RATS Trail Running Festival - 21K, hour by hour on the courseFrequently asked questions
How many checkpoints?
Desert RATS Trail Running Festival - 21K has 4 checkpoints: 4 aid stations. Details are in the two tables above.
What's the longest segment without aid?
The one leading to Finish: 9.7 km and 0 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?
Desert RATS Trail Running Festival - 21K is 21 km long with 642 m of elevation gain.
How long to finish?
With a UTMB Index of 600 (average runner), the estimated time is around 1h54 for Desert RATS Trail Running Festival - 21K.
What's the weather forecast?
The weather for Desert RATS Trail Running Festival - 21K 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 Desert RATS Trail Running Festival - 21K?
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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