Mosquito Pass

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Location Leadville, CO
Rating Moderate,
Length 10.8mi
Time 3hrs

Vehicle Types


Highest pass road in Colorado.

Highest pass road in Colorado open to motorized travel. Views from the 13,185 ft. summit are impressive on a clear day. Very interesting mine structures on the east side. Connects to difficult Birdseye Gulch, Trail #53. Spend some time in Leadville; it’s a great historic town.


Trail Ratings Defined

The upper portion of the trail is narrow and rocky on both sides of pass but suitable for aggressive, high-clearance, stock SUVs with low range. Road is closed when blocked by snow, which can occur well into late summer following a hard winter.






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Current Conditions

(719) 486-0749Pike and San Isabel N.F., Leadville R.D.

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Submitted by Jason
Pass is open all the way, but there is still a snowfield just below the summit on the Alma side. It’s deep but passable for most. Watched an unlifted Jeep get stuck and had to be towed out. Many parts of the pass are heavily rutted with large rocks, especially on the Leadville switchbacks making travel very tricky. In the current condition, I would NOT rate this as moderate.


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