Ultra Running Hub Syracuse, UT, United States · Saturday, October 17, 2026
Fixed Distance 100 mi
Antelope Island Fall Classic 100 Mile
31 days away
161 km Distance
not publishedn/a Climbing
8.1 est Grit · Hardcore
Calculated from 161 km alone — the organiser has not published an elevation profile. Read 8.1 as a floor, not a verdict.
What the course asks
Time limit 10 hours
3:44 min/km average. Tight. You are racing the clock from the start. Climbing is unpublished, so this pace is a ceiling on the effort, not a measure of it. Among the tightest 100 mi cut-offs we track. Measured against 30 races of the same distance. Cut-off calculator →
Typical conditions, October
Daytime high 15°C
Night low 3°C
Rainfall Mostly dry
Daylight 11 h 06 m of light
Regional 2001-2020 average for October — NASA POWER, grid elevation 1744 m. Not a forecast.
The Aid Station
Course-specific beta from the community
With trail terrain, choose a shoe with moderate cushioning for optimal performance.
For 100km+ efforts, prioritize real food at aid stations to prevent palate fatigue.
Gear for this race
Chosen for 161 km of trail.
- Trail Running Shoes161 km of trail — cushioning that is still there in the last quarter.
- Race NutritionPast 161 km the palate quits before the legs do — carry more than one flavour.
- Hydration VestsFlask capacity for 161 km, without the bounce.
- Headlamps161 km almost certainly means running into the night.
- AccessoriesChafe and blisters end more 161 km races than fitness does.
Course Notes
New start and finish at the Antelope Island State Park Marina but same course as years before.
Similar races
Other 100 mi trail ultras, closest in distance first.