Mosquito Pass Trail

Leadville, Colorado 80461

Mosquito Pass Trail

Mosquito Pass Trail Professional Review and Guide

"The route commences at Alma Junction, the intersection of Colorado 9 and Mosquito Pass Road (County 12), which was the junction of the railway spur to the London Mill and the main line. Special Attractions: The highest pass road in America; High historic significance; Wonderful alpine views. High-clearance 4WDs are recommended, though most stock SUVs are acceptable.

Expect a rough road surface with rocks larger than 6 inches, but there will be a reasonable driving line available. Patches of mud are possible but can be readily negotiated; sand may be deep and require lower tire pressures. There may be stream crossings up to 12 inches deep, substantial sections of single-lane shelf road, moderate grades, and sections of moderately loose road surface."

More Mosquito Pass Trail Professional Reviews and Guides

"This is the highest pass road in Colorado open to travel. Views from the 13,185 foot summit are impressive on a clear day. Legal side roads can be difficult, especially Birdseye Gulch, which includes a nasty mud bog. Great area to explore on an ATV. Seasonal wildflowers. This short-lived trail was actively used in the 1870s as the quickest way to reach western mining activities. Like so many of these high pass roads, travelers eventually found it easier to take longer but lower routes like Weston Pass.

In the late 1870s, Leadville was the most famous silver mining camp in the world and by the 1890s, it was the second largest city in Colorado. Today, Leadville is home to the National Mining Museum. View mines from a distance—they are dangerous and private. The upper portion of the trail is narrow and rocky on both sides of pass but suitable for aggressive, high-clearance, stock sport utility vehicles. Road is closed when blocked by snow, which can occur well into late summer. Check with the Bureau of Land Management or the Pike National Forest for road conditions."

Mosquito Pass Trail Reviews

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8/15/2015
Google and make sure there are no Burro races, those can really slow you down. Also, this trail, people on it and online, say is very easy and nothing--I have to say with my modified Jeep made for off-road it wasn't fun for us--and we're glad we left the dog at home even if we built him a custom bed in the back where the seats and trunk used to be. This road was scary in several sections, and we luckily only had to back up once on it--there were places that if we ran into someone I'm not quite sure anything could have been done--literally we would have had to get out and figure out a inch by inch plan. The views are just as good at Quandry/Blue Lakes by Boreas pass, and you can get up there in a 2wd, or MTN bike... This might be for some peeps, wasn't for us, not worth the risk when the payoff was nothing but seeing some older dudes walking up the back side with their donkeys...
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3/27/2009
As of 07/27/2009 Mosquito pass is open for this season, Great pass and trip. A little scarey in places (drop offs) but overall safe.
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7/31/2008
WE DID THIS TRAIL IN JULY OF 2008, WITH 2 FULL SIZE TRUCKS! IT WAS VERY SCARY BUT UTIMATELY THE BEST TRAIL YET, THAT WE HAVE BEEN ON. I WOULD SUGGEST USING A ATV OR A TRUCK WITH HIGH GROUND CLEARANCE. HOLD ON TO YOUR PANTS!!!!
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9/20/2005
This trail was a real challenge just to find it! It was a good challenge to even find the trailhead! It was a good challenge to get there and great when we finally made it. We had to tackle a snowstorm on the way, which made it even more interesting! Enjoyed the history there.
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Mosquito Pass Trail Photos

Trail Information

Leadville
Nearby City
16.7
Distance
Shuttle
Trail Type
Moderate
Difficulty
2 hours
Duration
Early August to mid-September
Season
Pike National Forest
Local Contacts
USGS Lake County, Park County #1; Trails Illustrated #109; USFS Pike National Forest, San Isabel National Forest
Local Maps

Activity Feed

Nov 2018