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Routes
Hiking trails & Routes
United States
Colorado
Lake County

Mount Massive Southwest Slopes Trail

Hard

3.3

(7)

91

hikers

Mount Massive Southwest Slopes Trail

04:13

6.19km

1,160m

Hiking

Hike the challenging Mount Massive Southwest Slopes Trail, a 3.8-mile route with 3797 feet of gain to Colorado's second-highest peak.

Last updated: February 26, 2026

Tips

Includes a segment that may be dangerous

A part of this route comprises technical, difficult, or hazardous terrain. Specialist equipment and prior experience may be required.

After 74 m for 6.12 km

Waypoints

A

Start point

Parking

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1

6.04 km

Mount Massive

Highlight • Summit

At 14,428 feet, Mount Massive is the second highest peak in Colorado. It is a popular summit due to having multiple routes and mainly only requiring class 1 and class …

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6.19 km

End point

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Way Types & Surfaces

Way Types

6.12 km

< 100 m

< 100 m

Surfaces

6.14 km

< 100 m

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Elevation

Elevation

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Weather

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Today

Thursday 7 May

6°C

-10°C

13 %

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Max wind speed: 20.0 km/h

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This route was planned by komoot.

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Frequently Asked Questions

How do I get to the trailhead and what are the parking conditions?

The trail starts at the North Halfmoon Creek Trailhead. Be aware that the road leading to it can be very rough, often requiring a high-clearance 4x4 vehicle, especially for the final section. Many hikers choose to park further down the road and walk the last half-mile to two miles to reach the trailhead.

What is the best time of year to hike this trail?

The ideal time to hike the Mount Massive Southwest Slopes Trail is typically from late June through September. Even in summer, lingering snowfields can be present, so always check current conditions. Early fall can offer beautiful colors but also brings colder temperatures and the possibility of early snow.

Are dogs allowed on the Mount Massive Southwest Slopes Trail?

Yes, dogs are generally permitted on this trail as it is located within the Mount Massive Wilderness. However, they must be kept on a leash at all times to protect wildlife and ensure a pleasant experience for all hikers. Please remember to pack out all pet waste.

Do I need any permits or pay an entrance fee to hike here?

No, there are typically no permits required for day hiking the Mount Massive Southwest Slopes Trail, nor are there any entrance fees for accessing the Mount Massive Wilderness. However, always check the latest regulations from the US Forest Service or Colorado Parks and Wildlife before your trip, as rules can change. You can find more information on the Colorado state website: colorado.gov.

What is the terrain like on the Southwest Slopes route?

The terrain is challenging and varied. The initial mile to mile and a half is relatively gentle through forest. After that, it becomes relentlessly steep, with switchbacks through alpine tundra, boulder fields where the path can be less obvious, and very steep, grassy open areas. Expect Class 2 hiking with some scrambling and loose trail conditions, especially at higher elevations.

What can I see along the route and from the summit?

The trail offers continuous and spectacular alpine views. As you ascend, you'll gain panoramic 360-degree views of the Sawatch Mountain Range and surrounding valleys. From the summit of Mount Massive, you can see the Elk Range in the distance. The approach along Halfmoon Creek is also quite scenic.

How long does it typically take to hike this trail?

Given its difficulty and significant elevation gain, most hikers should plan for a full day. While the Komoot tour data suggests around 4.2 hours, experienced hikers often take 8-12 hours or more to complete the 7.25 to 8.1-mile round trip, depending on fitness levels and weather conditions.

Is this trail suitable for beginners or families?

No, this trail is rated as difficult and is not recommended for beginners or young children. It involves a significant elevation gain (around 3,900 to 4,037 feet) over a relatively short distance, steep sections, and challenging terrain. It requires experienced hikers with good physical conditioning.

Does the trail intersect with other well-known paths?

Yes, the route utilizes sections of several official trails. You will follow parts of the Mt. Massive/North Halfmoon - 1451 trail and the North Halfmoon Lakes Trail - 1485. There are also sections that briefly align with the Mount Massive East Slopes (Standard) route and Halfmoon Road.

What makes the Mount Massive Southwest Slopes Trail particularly notable?

This trail leads to Mount Massive, Colorado's second-highest 14er, known for its impressive five summits above 14,000 feet. It's a shorter but much steeper route compared to others, offering a more intense physical challenge and continuous, stunning views throughout the ascent and from the top. It's a true wilderness experience.

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