Rim Rock Half 2026
The forecast arrives five days before the start.
Here you'll find the elevation profile and an estimated finish time based on your UTMB Index.
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 - Rim Rock Half · 2026
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
Aid station contents not documented.
Elevation profile
The course and its aid stations
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- Desert RATS Trail Running Festival - 21K21 km · 642 m D+ · April 11, 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
Sources and method
- Time projection — for lack of results on this race, times by UTMB Index rely on a Riegel law whose exponent is adjusted to elevation gain — the model's fallback, not its usual method. 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 — Rim Rock Half
Weather for Rim Rock Half
The weather for Rim Rock Half 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 Rim Rock Half, hour by hour on the courseFrequently asked questions
How many checkpoints?
Rim Rock Half has 3 checkpoints: 3 checkpoints with undocumented contents. Details are in the two tables above.
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?
Rim Rock Half is 21 km long with 21 m of elevation gain.
How long to finish?
With a UTMB Index of 600 (average runner), the estimated time is around 1h37 for Rim Rock Half.
What's the weather forecast?
The weather for Rim Rock Half 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 Rim Rock Half?
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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