Ultra Running Hub Syracuse, UT, United States · Saturday, October 17, 2026
Fixed Distance 100 mi
Antelope Island Fall Classic 100 Mile
17 days to go
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 Climbing is unpublished, so this pace is a ceiling on the effort, not a measure of it.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 Shoes 161 km of trail — cushioning that is still there in the last quarter.
- Race Nutrition Past 161 km the palate quits before the legs do — carry more than one flavour.
- Hydration Vests Flask capacity for 161 km, without the bounce.
- Headlamps 161 km almost certainly means running into the night.
- Accessories Chafe and blisters end more 161 km races than fitness does.
Similar races
Other 100 mi trail ultras, closest in distance first.