Race. Train. Gear up.
Saturday, October 10, 2026 Johnston City, IL, USA
Timed 50k

Arrowhead 12 Hour Endurance Run

120 days away
50km Distance
2.5 Grit Score
Entry Level Level
Vertical Intensity 0 D+/km
Flat Hilly Mtn

This course is relatively flat and fast. Ideal for PB attempts.

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

Course Intelligence

OPENFREE MAP (LIBRE)

Course Notes

The race will be held on a 2 mile crushed gravel loop. It is a gently rolling loop that goes around beautiful Lake Arrowhead. The course is partially shaded. There will be one awesomely stocked aid station at the start/finish.