Mosquito Pass (13,185′), Mosquito Range

Mosquito Pass was built to connect the towns of Alma to the east, with Leadville to the west. It is the highest crossable vehicle mountain pass in the U.S. outside of Alaska. While there are higher vehicle passes, they are all out and back. The trail crosses the Continental Dividebetween the Arkansas and South Platte Rivers.

The Mosquito Range is also home to five 14,000′ peaks;  Mt Sherman Mt Democrat, Mt Cameron, Mt Lincoln, and Mt Bross.

Mosquito Pass Elevation Map

The top of the pass is the turnaround point for the 21-mile course of the Western Pack Burro Ass-ociation’s burro races, held the first weekend of August each year and part of the Leadville Boom Days heritage festival.

Each June, hundreds of people run to the top of the pass in the Leadville Trail Marathon and Heavy Half Marathon, part of the CenturyLink Leadville Race Series.


GPS Route with Elevation

Video Tour

Route Directions

From Fairplay, follow Colorado Highway 9 north for 4 1/5 miles to County Road 12 (Mosquito Pass Road) and turn left.  The tour begins quickly after turning off Highway 9.

Trailhead Directions