Lake Sonoma 50 2026
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 11 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 - Lake Sonoma 50 · 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
| Product | South Lakekm 3.9 | Island View 1km 11.0 | Warm Springs 1km 21.9 | Wulfow 1km 29.9 | Madrone Point 1km 34.3 | Lone Rock Benchkm 41.1 | Madrone Point 2km 47.9 | Wulfow 2km 52.2 | Warm Springs 2km 60.3 | Island View 2km 71.1 | South Lakekm 78.3 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Water | available | available | available | available | available | available | available | available | available | available | available |
| Brand products | unavailable | available | available | unavailable | available | available | available | unavailable | available | available | unavailable |
La feuille de ton assistance pour Lake Sonoma 50 · 2026
Ton assistance peut te voir à ces postes. Ton plan RAVIT y met tes heures, ce qu'elle te tend et la route pour y aller.
- Warm Springs 1km 21.9
- Madrone Point 1km 34.3
- Lone Rock Benchkm 41.1
- Madrone Point 2km 47.9
- Warm Springs 2km 60.3
Recto, verso et planche d'étiquettes, en PDF : l'exemple d'une coureuse de l'UTMB.
Elevation profile
The course and its aid stations
Lake Sonoma 50: 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 12h39 to 7h50, and the aid-station stop budget from 0h43 to 0h15. The longer the race, the more stops weigh: this is time you should plan to spend standing still, not only running.
Source
Below a UTMB® Index of roughly 440, the overall cut-off of 14h00 is no longer reachable at the estimated pace.
| UTMB® Index | Estimated time | Of which stops | Night hours | Carbs | Fluid | Sodium | Cut-off margin |
|---|---|---|---|---|---|---|---|
| 500 | 12h39 | 0h43 | 0.5 | 759 g | 8.9 L | 6,328 mg | +1h21 |
| 550 | 11h37 | 0h35 | 0.5 | 697 g | 8.1 L | 5,811 mg | +2h23 |
| 600 | 10h40 | 0h29 | 0.5 | 640 g | 7.5 L | 5,334 mg | +3h20 |
| 650 | 9h47 | 0h24 | 0.5 | 587 g | 6.9 L | 4,895 mg | +4h13 |
| 700 | 9h01 | 0h20 | 0.5 | 541 g | 6.3 L | 4,511 mg | +4h59 |
| 750 | 8h22 | 0h17 | 0.5 | 502 g | 5.9 L | 4,183 mg | +5h38 |
| 800 | 7h50 | 0h15 | 0.5 | 470 g | 5.5 L | 3,920 mg | +6h10 |
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.
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Lake Sonoma 50 over the years
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 — Lake Sonoma 50
Weather for Lake Sonoma 50
The weather for Lake Sonoma 50 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 Lake Sonoma 50, hour by hour on the courseFrequently asked questions
How many checkpoints?
Lake Sonoma 50 has 12 checkpoints: 7 aid stations, 4 water points, and 1 checkpoint with undocumented contents. Details are in the two tables above.
What's the longest segment without aid?
The one leading to Warm Springs 1: 10.9 km and 398 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?
Lake Sonoma 50 is 81 km long with 2922 m of elevation gain.
How long to finish?
With a UTMB Index of 600 (average runner), the estimated time is around 10h40 for Lake Sonoma 50.
What's the weather forecast?
The weather for Lake Sonoma 50 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 Lake Sonoma 50?
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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