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Routes
Hiking trails & Routes
United States
Colorado
Gunnison County

Little Pass Creek, Swampy Pass, and Lowline Loop

Routes
Hiking trails & Routes
United States
Colorado
Gunnison County

Little Pass Creek, Swampy Pass, and Lowline Loop

Hard

4.9

(9218)

11,351

hikers

Little Pass Creek, Swampy Pass, and Lowline Loop

05:40

19.6km

510m

Hiking

Hike the difficult 12.2-mile Little Pass Creek, Swampy Pass, and Lowline Loop in Gunnison National Forest, featuring aspen groves and Castle

Last updated: February 26, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

West Elk Wilderness

Gunnison National Forest

Waypoints

A

Start point

Parking

Get Directions

1

1.44 km

Swampy Pass Trail

Highlight (Segment) • Trail

Swampy Pass Trail is one of those paths that almost always offers solitude since such few people utilize the trail. The trail creates a loop that is uphill on the …

Tip by

2

11.5 km

Little Pass Creek wetlands

Highlight (Segment) • Natural

B

19.6 km

End point

Parking

Loading

Way Types & Surfaces

Way Types

17.4 km

2.22 km

< 100 m

Surfaces

11.8 km

7.76 km

< 100 m

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Elevation

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

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Weather

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Today

Friday 10 July

23°C

8°C

0 %

Additional weather tips

Max wind speed: 14.0 km/h

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Frequently Asked Questions

Where does the Little Pass Creek, Swampy Pass, and Lowline Loop trail start, and is there parking?

The loop is located near Crested Butte, Colorado, within the scenic "Castles" area and the West Elk Wilderness, close to Ohio Pass. While specific parking details aren't provided, trailheads in this region typically have designated parking areas. It's always a good idea to check local forest service resources for the most current access information.

Is this trail dog-friendly?

Yes, trails in the West Elk Wilderness and Gunnison National Forest generally allow dogs. However, always ensure your dog is under control, preferably on a leash, to protect wildlife and ensure a pleasant experience for all hikers. Please practice Leave No Trace principles and pack out all waste.

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

The best time to hike this loop is during the summer for abundant wildflowers and in the fall for spectacular golden aspens, especially around the Ohio Pass zone. The fall foliage is a major highlight. Summer offers good opportunities for wildlife viewing due to less foot traffic.

Are there any permits or fees required to hike in the Gunnison National Forest?

Generally, day hiking in the Gunnison National Forest does not require specific permits or fees. However, regulations can change, and certain activities or overnight stays might require permits. It's always best to check the official U.S. Forest Service website for the Gunnison National Forest before your trip for the most up-to-date information on any potential fees or regulations.

Is the Little Pass Creek, Swampy Pass, and Lowline Loop suitable for beginners?

No, this loop is considered a substantial and difficult hike. While individual sections like a shorter "Swampy Pass to Viewpoint" might be easier, the full loop is approximately 14 to 14.5 miles long with significant elevation changes, making it more suitable for experienced hikers.

How long does it typically take to complete the loop?

The full loop is estimated to take around 5 hours and 40 minutes of moving time, but plan for a full day, especially considering breaks, photo opportunities, and the challenging terrain. The total duration for this 19.6 km (12.2 miles) hike is approximately 20408 seconds, which is about 5 hours and 40 minutes.

What kind of scenery and natural features can I expect on the trail?

You can expect incredibly diverse and picturesque scenery. The trail winds through beautiful aspen groves and open meadows, offering stunning panoramic views of the Anthracites and the iconic Castles rock formations. You'll also pass through the Little Pass Creek wetlands and experience the Swampy Pass Trail, known for its immediate views.

What wildlife might I encounter on the trail?

Due to less foot traffic, the area offers good opportunities for wildlife viewing. While specific species aren't guaranteed, you might spot deer, elk, various bird species, and other forest animals common to the Colorado Rockies. Always observe wildlife from a distance and do not disturb them.

Does this loop connect with other trails?

Yes, this loop utilizes sections of several official trails. You'll hike along parts of the Little Pass Creek Trail, Swampy Pass Trail 439, Lowline Trail 438, and even some sections of the Braun Bypass Trail and Castle Creek Trail.

Are there any sections of the trail that are difficult to follow?

Yes, hikers should be aware that parts of the trail, particularly near the top of the Swampy Pass loop, can become difficult to follow and may even disappear. Be prepared for potential route-finding challenges and possibly some light bushwhacking in these areas. Carrying a reliable map or GPS device is highly recommended.

What is the terrain like on this loop?

The terrain is varied and challenging. You'll traverse through beautiful aspen groves and open meadows, with significant elevation changes. Some sections are well-defined singletrack, while others, especially near Swampy Pass, can be faint or disappear, requiring careful navigation. Expect a mix of dirt paths, rocky sections, and potentially muddy areas, especially near the wetlands.

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