Volcano, HI, United States · Thursday, December 31, 2026

Fixed Distance 100 mi

Go Big 100 Mile Race

119 days away

161 km Distance

1,500 m Climbing

10.0 Grit · Elite / extreme

19.4428° N, 155.2340° W © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Climbing rate 9 m / km Fast & Flat. This course is relatively flat and fast. Ideal for PB attempts.

Time limit 48 hours 17:53 min/km average. Generous. Walkable throughout for most of the field. Among the most forgiving 100 mi cut-offs we track. Measured against 29 races of the same distance. Cut-off calculator →

Field size ~3 Tiny. You will run alone for most of it.

DUV results for the 2023 edition (100mi) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, December

Daytime high 22°C

Night low 19°C

Rainfall Wet — expect rain

Daylight 10 h 58 m of light

Regional 2001-2020 average for December — NASA POWER, grid elevation 482 m. Not a forecast.

The Aid Station

Course-specific beta from the community

⛰️ terrain

This is a fast & flat course. Expect fast, runnable sections where rhythm is key.

By UltraHub Expert

👟 gear

With trail terrain, choose a shoe with moderate cushioning for optimal performance.

By UltraHub Expert

🥤 nutrition

For 100km+ efforts, prioritize real food at aid stations to prevent palate fatigue.

By UltraHub Expert

Gear for this race

Chosen for 161 km of trail with 1,500 m of ascent.

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 A 48 h limit puts you out there after dark.
Accessories Chafe and blisters end more 161 km races than fitness does.