3.3
(22)
88
hikers
05:27
17.0km
730m
Hiking
Embark on the Devils Causeway and Causeway Lake hike, a challenging route that spans 10.6 miles (17.0 km) with a significant elevation gain of 2394 feet (730 metres). You can expect to spend around 5 hours and 27 minutes navigating diverse landscapes, from forested valleys to steep talus slopes. The…
Last updated: April 23, 2026
Tips
Your route passes through protected areas
Please check local regulations for:
Flat Tops Wilderness
Waypoints
Start point
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8.66 km
Highlight • Lake
Tip by
15.8 km
Highlight • Trail
Tip by
17.0 km
End point
Way Types & Surfaces
Way Types
8.50 km
8.42 km
Surfaces
8.50 km
8.42 km
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Wednesday 27 May
11°C
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44 %
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This route was planned by komoot.
The main trailhead for this route is located near Stillwater Reservoir in the Flat Tops Wilderness. You'll find parking available there, but it can fill up quickly during peak season.
This trail is rated as difficult, primarily due to the challenging crossing of the Devil's Causeway itself. This section is a very narrow land bridge, only 3 to 4 feet wide in places, with significant drop-offs on both sides. It's not recommended for beginners or anyone with a strong fear of heights. Many experienced hikers cross this section on their hands and knees due to the exposure.
The best time to hike the Devils Causeway and Causeway Lake trail is typically from late June through September. During this period, the snow has usually melted, and the weather is more stable. Wildflowers are abundant in the summer months. Always check weather conditions before heading out, as rapid changes are common in the Flat Tops Wilderness.
Yes, dogs are generally allowed on trails within the Flat Tops Wilderness. However, they must be kept on a leash to protect wildlife and ensure a pleasant experience for all hikers. Please remember to pack out all pet waste.
No, there are typically no permits required or entrance fees to hike the Devils Causeway and Causeway Lake trail within the Flat Tops Wilderness. However, it's always a good idea to check the USDA Forest Service website for any current regulations or fire restrictions before your visit.
The most iconic feature is the Devil's Causeway itself, a dramatic narrow land bridge. You'll also pass the serene Causeway Lake, which is a beautiful spot for a break. The trail offers expansive 360-degree panoramic views of the Flat Tops Wilderness, including the Stillwater Reservoir and surrounding volcanic plateaus.
The terrain varies significantly. The initial sections near Stillwater Reservoir and up to Little Causeway Lake are less strenuous. Beyond Little Causeway Lake, the trail steepens considerably, involving switchbacks and talus slopes. The landscape transitions from forested valleys and lush meadows to exposed ridgelines and the unique flattened basaltic domes characteristic of the Flat Tops Wilderness.
Yes, while the direct route to the Causeway and back is popular, there is also a longer 10 to 10.5-mile loop option. This loop returns to the reservoir via Mosquito Lake, offering diverse scenery and a more extensive exploration of the Flat Tops Wilderness.
Yes, the route also passes through sections of the East Fork Trail, Devils Causeway Trail, Bear River Trail, and North Derby Trail, offering connections to a broader network within the wilderness.
Given the trail's difficulty and exposure, it's crucial to be well-prepared. Bring plenty of water, high-energy snacks, sturdy hiking boots, layers of clothing (weather can change rapidly), rain gear, sun protection (hat, sunscreen), a map and compass or GPS device, and a first-aid kit. Trekking poles can be very helpful, especially on the steep and rocky sections.
Absolutely. While the full route to the Devil's Causeway is challenging, the initial section of the trail to Causeway Lake (also known as Little Causeway Lake) is much less strenuous and offers a beautiful, family-friendly experience. It's about 1.5 miles in and provides a peaceful, idyllic spot for a picnic or rest without the extreme exposure of the Causeway itself.