2.9
(25)
94
hikers
01:41
4.74km
430m
Hiking
The Devil's Causeway is a truly unique hiking experience in the Flat Tops Wilderness, offering a thrilling journey across a narrow natural land bridge. You'll start with serene views of Stillwater Reservoir and wildflower-filled meadows before the trail climbs steeply, leading to the dramatic, exposed Causeway itself. This geological marvel, sometimes just 3 to 4 feet wide, connects two sections of the plateau, providing unparalleled 360-degree panoramic views that make the 2.9-mile (4.7 km) route, with its 1423 feet (434 metres) of elevation gain, feel incredibly rewarding.
Planning your visit requires careful attention to the weather; the trail reaches 11,800 feet, and conditions can shift quickly. It's best to avoid the crossing if it's wet, windy, or stormy due to the significant exposure. Access is via the Stillwater Trailhead, where parking is available, but arriving early is recommended, especially during summer months, to secure a spot and beat any afternoon weather.
What makes the Devil's Causeway truly notable is its extreme narrowness and the adrenaline-pumping exposure it provides, a feature that sets it apart from many other trails. This natural land bridge, formed by past glaciation, is a testament to the unique
Last updated: June 9, 2026
Tips
Your route passes through protected areas
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Waypoints
Start point
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95 m
Highlight • Parking
Tip by
4.56 km
Highlight • Gorge
Tip by
4.74 km
End point
Way Types & Surfaces
Way Types
4.71 km
< 100 m
Surfaces
4.72 km
< 100 m
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Thursday 2 July
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The main route to the Devil's Causeway is about 2.9 miles (4.7 km) one way from the Stillwater Trailhead, with a significant elevation gain. While the total moving time is around 1 hour 41 minutes, most hikers should plan for a 3-5 hour round trip, allowing for breaks, enjoying the views, and navigating the challenging sections.
The trail starts through forests and past alpine lakes, then opens up to high alpine meadows. The most notable feature is the Devil's Causeway itself: a narrow, natural rock bridge, only 3-4 feet wide in places, with sheer drops on both sides. The higher elevations are exposed, and the path can be rugged with talus slopes.
This trail is generally rated as moderate to difficult due to significant elevation gain, high altitude (around 11,800 feet), and the extremely narrow, exposed section of the Causeway. It is not recommended for beginners or young children, especially the Causeway section itself, which requires a good head for heights and stable footing.
The most common starting point is the Stillwater Trailhead, located near Stillwater Reservoir. Parking is available there, but it can fill up quickly, especially on weekends. Arriving early in the morning is highly recommended to secure a spot.
The best time to hike is typically from late June or early July through September. During this period, the snow has usually melted, and wildflowers are abundant. Always check weather conditions before heading out, as rapid changes, including thunderstorms, are common in the high alpine environment.
Yes, dogs are generally allowed on trails within the Flat Tops Wilderness Area. However, they must be kept on a leash to protect wildlife and ensure the safety of other hikers. Be mindful of the challenging terrain and exposure, especially on the Causeway itself, which might not be suitable for all dogs.
No, there are no specific permits required for day hiking the Devil's Causeway trail, nor are there entrance fees for accessing the Flat Tops Wilderness Area. However, standard wilderness regulations apply, such as Leave No Trace principles. You can find more information on wilderness regulations at usda.gov.
The trail is famous for its incredibly narrow and exposed natural rock bridge, the Devils Causeway. This section, only 3-4 feet wide with sheer drops, offers a thrilling and challenging experience, often requiring hikers to cross on hands and knees. It provides unparalleled views and a profound sense of accomplishment for those who conquer it.
Yes, the route primarily follows sections of the East Fork Trail. It also briefly touches upon the Devils Causeway Trail, North Derby Trail, and Bear River Trail at various points.
Given the high altitude and exposed sections, be prepared for rapid weather changes, including thunderstorms. Altitude sickness can be a concern. The narrow Devils Causeway section should not be attempted in wet or windy conditions, or if bad weather is approaching, as there are no safety features. Always carry plenty of water, layers of clothing, and navigation tools.
As you ascend, the landscape opens up to stunning high alpine meadows, often dotted with wildflowers in summer. From higher elevations, you'll be rewarded with spectacular vistas of the surrounding mesas, valleys, and distant peaks of the Flat Tops Wilderness. The views from the Devils Causeway itself are panoramic and breathtaking.
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