2.6
(27)
67
hikers
08:20
27.5km
890m
Hiking
Hike the difficult 17.1-mile Mosquito Pass Road for stunning high-alpine views, historic mines, and a challenging Rocky Mountain adventure.
Last updated: February 26, 2026
Tips
Your route passes through a protected area
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Waypoints
Start point
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13.9 km
Highlight • Climb
Tip by
15.7 km
Highlight • Mountain Pass
Tip by
18.5 km
Highlight • Viewpoint
Tip by
27.5 km
End point
Way Types & Surfaces
Way Types
17.8 km
9.74 km
Surfaces
16.1 km
8.78 km
2.72 km
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Elevation
Highest point (4,010 m)
Lowest point (3,110 m)
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Weather
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Today
Thursday 7 May
8°C
-6°C
15 %
Additional weather tips
Max wind speed: 22.0 km/h
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This route was planned by komoot.
The terrain is rugged and rocky, especially in the upper sections. Expect significant rockiness, loose shale, and potentially narrow parts. The unpaved road can be heavily rutted with large rocks. The Alma side, in particular, is known for 'wall to wall rocks' where the dirt has washed out, leaving loose stones. Be prepared for steep grades and exposed sections.
The route offers spectacular panoramic views of the Rocky Mountains. From the summit, you can see several 14ers like Mount of the Holy Cross, Mount Massive, Mount Elbert, and Mount Sherman. You'll also pass interesting historical mine structures, particularly on the east side, remnants of the area's rich silver mining past. Don't miss the Mosquito Pass summit itself, the Ridge to London Mountain, and the Lookout over Diamond & Mountain Lake.
The best time to hike is typically from late June through early October, after most of the snow has melted. However, snow can linger well into late summer, even August, at higher elevations. Early autumn offers vibrant golds, ambers, and greens in the valley foliage, contrasting beautifully with the treeless ridges. Always check current conditions before heading out.
Access points are available from both Leadville and Alma. Parking is typically found near the start of the unpaved road on either side. Specific trailhead parking areas may vary, so it's advisable to research the most current access points before your visit.
Yes, the trail is generally dog-friendly. However, given that it's located within the Pike and San Isabel National Forests, it's crucial to follow all forest regulations, which typically include keeping dogs on a leash to protect wildlife and ensure the safety of other hikers. Always pack out waste.
Mosquito Pass Road is located within the Pike and San Isabel National Forests. Generally, there are no specific permits required for day hiking on this route, nor are there entrance fees. However, always check the official US Forest Service website for the Pike and San Isabel National Forests for any updated regulations or temporary closures before your trip.
Mosquito Pass Road is generally rated as difficult for hiking due to its high altitude (summit at 13,185 feet / 4,019 meters) and rugged, rocky terrain. The high elevation can cause altitude sickness, and the uneven surface requires careful footing. It is not recommended for beginners or those not accustomed to high-altitude, challenging trails. Acclimatization is highly advised.
Given the high altitude and challenging conditions, you should bring plenty of water, layers of clothing (weather can change rapidly), sturdy hiking boots, sun protection (hat, sunscreen), a map and compass or GPS device, and snacks. Trekking poles can be very helpful on the rocky terrain. Be prepared for potential snow even in summer.
Yes, the route also passes through sections of the Mosquito Pass Road, the TransAmerica Trail (Colorado), and the Mineral Belt Trail.
Mosquito Pass Road is historically significant as a vital route for silver miners during the 1870s boom, connecting Leadville and Alma. You can see remnants of abandoned mines, such as the Diamond Mine and North London Mine, along the route. A monument at the summit honors Father John Lewis Dyer, a pioneer who famously traversed the pass on snowshoes.
The evocative nickname 'Highway of Frozen Death' stems from the pass's history of claiming the lives of unprepared miners due to fast-moving winter storms during the silver mining era. It serves as a stark reminder of the harsh conditions and dangers faced by those who traversed it.