Devils Causeway Loop

While the route is categorized for jogging, the Devils Causeway Loop is generally considered more suitable for advanced trail running and hiking due to its varied and demanding terrain. It features steep climbs, talus slopes, and a very narrow, exposed section at the Devils Causeway itself, which requires crawling. Some sections, particularly after the Causeway on the Chinese Wall Trail and during the descent, may be runnable, but significant portions are not.

The komoot route suggests an average duration of approximately 2 hours and 16 minutes for jogging the 16.6 km (10.3 mi) loop. However, given the difficult terrain, high altitude, and technical sections, many visitors, especially those hiking or taking their time, will take significantly longer. Plan for a full half-day or more, especially if you want to enjoy the scenery.

The trail typically starts and ends at the Stillwater Trailhead. This is where you'll find parking for accessing the loop.

The Flat Tops Wilderness, where the Devils Causeway Loop is located, generally does not require permits for day use or have entrance fees. However, it's always wise to check the latest regulations with the U.S. Forest Service (usda.gov) before your visit, especially for overnight stays or specific activities. You can find more information on the official USDA website.

The terrain is highly varied and challenging. It begins relatively easy near Stillwater Reservoir but quickly transitions to steep climbs with switchbacks and talus slopes. The highlight, the Devils Causeway, is a narrow, rocky land bridge with sheer drop-offs. After this, the Chinese Wall Trail portion can be rutted but offers more expansive, potentially runnable sections across alpine tundra. The descent is generally a well-defined trail through forests. Expect a mix of runnable segments, significant climbs, and technical, rocky areas.

Dogs are generally allowed in the Flat Tops Wilderness, but they must be kept on a leash. Always practice Leave No Trace principles, including packing out all pet waste. Be aware that the challenging terrain, especially the narrow Devils Causeway, might be difficult or unsafe for some dogs.

The best time to visit is typically from late June or early July through September. During this period, the snow has usually melted, and the weather is more stable. The high alpine meadows are vibrant with wildflowers in mid-summer. Visiting outside this window can mean encountering snow, ice, and more unpredictable weather conditions, making the trail significantly more challenging and potentially dangerous.

Due to the high altitude (reaching approximately 11,800 feet at the Causeway) and significant exposure above the tree line, rapid weather changes and afternoon thunderstorms are common hazards. Always check the forecast before you go and be prepared for sudden drops in temperature, rain, or hail. Start early to minimize exposure to afternoon storms.

The primary highlight is the unique geological formation of the Devils Causeway itself. You'll also encounter beautiful alpine lakes like Little Causeway Lake and Stillwater Reservoir, expansive high alpine meadows, and impressive views of the Chinese Wall formation. The entire route offers panoramic vistas of the surrounding Flat Tops Wilderness.

Yes, the route incorporates sections of several other trails within the Flat Tops Wilderness. You will traverse parts of the Bear River Trail, Chinese Wall Trail, East Fork Trail, and the Devils Causeway Trail itself, among others like Little Trappers Trail and North Derby Trail.

The Devils Causeway is a natural land bridge, only 3 to 4 feet wide in places, with sheer drop-offs of hundreds of feet on either side. Crossing this approximately 50-foot section often requires crawling or using all fours due to the exposure and narrowness, making it a thrilling but mentally and physically demanding part of the loop.