Race. Train. Gear up.
Saturday, April 18, 2026 Crystal Lake, IL, USA
Trail 50k

Earth Day 50k

Race completed
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 beautiful course features winding single track, rolling hills, blossoming spring flowers, open prairie, and pine forest.