Antelope Island Fall Classic 2026
Forecast published: 55°F feels-like at the coldest, 69°F at the warmest, with a risk of thunderstorms.
Here you'll find the elevation profile, an estimated finish time based on your UTMB Index and details of the 7 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 - Antelope Island Fall Classic · 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 | Lower Frary 1km 9.9 | Lower Frary 2km 22.8 | Ranchkm 31.8 | North Sentrykm 38.3 | Elephant Head 1km 51.1 | Elephant Head 2km 55.6 | White Rockkm 64.0 |
|---|---|---|---|---|---|---|---|
| Water | available | available | available | available | available | available | available |
| Brand products | available | available | available | unavailable | available | available | available |
Elevation profile
The course and its aid stations
Other trails worth preparing for
- Fort Collins - Marathon43 km · 1,162 m D+ · October 18, 2026
- Firewater 100K97 km · 1,314 m D+ · October 24, 2026
- Bridge Burner 35mile58 km · 1,616 m D+ · October 24, 2026
- Coldwater 50k52 km · 1,293 m D+ · November 1, 2026
- Tunnel Hill 5081 km · 182 m D+ · November 7, 2026
- Mountain Masochist 100k101 km · 3,268 m D+ · November 7, 2026
- Mountain Masochist 5081 km · 2,311 m D+ · November 7, 2026
- Lake Chabot 50K49 km · 1,896 m D+ · November 7, 2026
- Mt. Tam 50k48 km · 2,005 m D+ · November 7, 2026
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 — Antelope Island Fall Classic
Weather for Antelope Island Fall Classic
Section-by-section forecasts for Antelope Island Fall Classic, calculated at the estimated passing time: feels-like temperature, rain or snow, wind and thunderstorms. Three models — AROME (Météo-France), ICON (DWD) and ECMWF IFS — served from the finest to the farthest-reaching.
Forecasts for a 600 UTMB Index runner, at their estimated passage time. Start Sat, 10/10 06:00 AM: Storm, 68°F. Coldest: 55°F feels-like at Ranch (Sat, 10/10 09:21 AM); warmest: 69°F at Elephant Head 2 (Sat, 10/10 11:51 AM). Rain expected on 6 segments, including Lower Frary 2, North Sentry, Elephant Head 1, Elephant Head 2, …; up to 1.3 mm on one segment. Gusts up to 26 mph at Elephant Head 2. Risk of thunderstorms at Start, Lower Frary 1, Lower Frary 2, Ranch.
Forecast, not guaranteed: in the mountains a model describes a grid of several hundred meters, not the slope you're on.
Weather data: Météo-France (AROME), DWD (ICON), ECMWF (IFS) — CC BY 4.0, via Open-Meteo
Frequently asked questions
How many checkpoints?
Antelope Island Fall Classic has 8 checkpoints: 6 aid stations, 1 water point, and 1 checkpoint with undocumented contents. Details are in the two tables above.
What's the longest segment without aid?
The one leading to Lower Frary 2: 12.9 km and 770 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?
Antelope Island Fall Classic is 69 km long with 1700 m of elevation gain.
How long to finish?
With a UTMB Index of 600 (average runner), the estimated time is around 7h14 for Antelope Island Fall Classic.
What's the weather forecast?
Forecast published: 55°F feels-like at the coldest, 69°F at the warmest, with a risk of thunderstorms. RAVIT publishes the weather for Antelope Island Fall Classic section by section: feels-like temperature, rain or snow, wind and storms, at the estimated passage time. Forecasts come from AROME (Météo-France), ICON (DWD) and ECMWF IFS, refreshed several times a day.
Want to stack the odds in your favor for Antelope Island Fall Classic?
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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