Connects: Marble to Crested Butte, Hasley Basin Trail
![Hasley Pass](https://www.aspentrailfinder.com/wp-content/uploads/2016/07/Hasley-Pass-Aspen-Maroon-Bells-Snowmass-Wilderness.jpg)
View from the top of Hasley Pass
Aspen, CO – Mountain Pass
Hasley Pass (12,144 ft) is a high mountain pass along the Hasley Basin Trail. This is a mountain pass in the Maroon Bells-Snowmass Wilderness.
![Four Pass Loop Trail Map](https://www.aspentrailfinder.com/wp-content/uploads/2017/05/Four-Pass-Loop-Trail-Map-Aspen-Trail-Finder-Printable-v1-1.jpg)