Saturday, July 18, 2026 Aspen, CO, USA

Trail 50k

Power of Four Trail Run

36 days away

50km Distance

3,700m Elevation

8.1 Grit Score

Hardcore Level

Vertical Intensity 74 D+/km

Flat Hilly Mtn

Extreme verticality. This is a technical mountain course with sustained steep grades.

The Aid Station

Course-specific beta from the community

⛰️ terrain

This is a vertical course. Poles are highly recommended for the sustained climbs.

By UltraHub Expert

👟 gear

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

By UltraHub Expert

OPENFREE MAP (LIBRE)

A scenic mix of trails across the mountains of Aspen Snowmass. 12,178 feet elevation gain / 11,632 feet elevation loss.