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Hiking trails & Routes
United States
Colorado
Park County

Mosquito Pass Road

Hard

2.6

(27)

67

hikers

Mosquito Pass Road

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

A

Start point

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1

13.9 km

Ridge to London Mountain

Highlight • Climb

London Mountain is 13,194 feet and is mainly climbed by peak baggers checking 13,000 foot peaks off their list. There are a number of ways to summit the peak, but by far the most common route choice is following this west ridge to the summit. It is basically a rocky class 2 scramble all the way to the top.

Tip by

2

15.7 km

Mosquito Pass

Highlight • Mountain Pass

Mosquito Pass (sandwiched between Mosquito Peak and Mount Evans "B") sits at 13,185 feet atop an old mining road. The pass separates the towns of Alma and Leadville and requires some real clearance and 4wd abilities to reach via car. The high mountain pass offers access to some of the nearby peaks and views of the Sawatch, Mosquito, and Tenmile Ranges.

Tip by

3

18.5 km

Diamond and Mountain Lake are actually two reservoirs that provide water to the town of Leadville. This road junction with the Birds Eye Gulch Jeep Road offers great views down the valley. The basin gets a lot of water, and there can be acres of wildflowers up here sometimes.

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B

27.5 km

End point

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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

Elevation

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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.

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Frequently Asked Questions

What is the terrain like on Mosquito Pass Road?

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.

What can I see along the route?

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.

What is the best time of year to hike Mosquito Pass Road?

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.

Where can I park to access the Mosquito Pass Road trail?

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.

Is Mosquito Pass Road dog-friendly, and what are the rules?

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.

Do I need a permit or pay an entrance fee to hike Mosquito Pass Road?

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.

Is the trail suitable for beginners?

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.

What should I bring for a hike on Mosquito Pass Road?

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.

Does the trail intersect other well-known paths?

Yes, the route also passes through sections of the Mosquito Pass Road, the TransAmerica Trail (Colorado), and the Mineral Belt Trail.

What is the historical significance of Mosquito Pass Road?

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.

What is the origin of the nickname 'Highway of Frozen Death'?

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.

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