1
hikers
02:57
10.1km
450m
Hiking
Hike the moderate Upper Seymour Lake via CDT trail through the Anaconda-Pintler Wilderness to a clear alpine lake and panoramic views.
Last updated: February 26, 2026
Tips
Your route passes through a protected area
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Waypoints
Start point
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10.1 km
End point
Way Types & Surfaces
Way Types
10.1 km
Surfaces
10.1 km
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Elevation
Highest point (2,520 m)
Lowest point (2,080 m)
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Weather
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Tuesday 14 July
22°C
11°C
55 %
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This route was planned by komoot.
The trailhead for the Upper Seymour Lake via CDT hike is typically accessed from the Anaconda-Pintler Wilderness area. While specific parking details aren't provided, trails within wilderness areas usually have designated parking lots at their access points. It's always a good idea to check with the local forest service for the most current information on trailhead access and parking availability before your trip.
The hike to Upper Seymour Lake is approximately 10.1 kilometers (6.3 miles) round trip. Based on an average hiking pace, it typically takes around 2 hours and 57 minutes to complete the route, not including stops for breaks or enjoying the scenery.
The hike to Upper Seymour Lake is generally considered moderate. The initial 5.5 to 7 miles feature an easy to gentle grade. However, the last 1.5 miles leading up to the lake involve a steady and slightly strenuous climb with switchbacks. If you extend your trip to Goat Flat, expect a more vigorous and moderately steep climb.
The trail offers varied terrain and stunning scenery. You'll hike through lush lodgepole pine forests along Seymour Creek, encountering small meadows abundant with wildflowers in the lower sections. The route culminates at Upper Seymour Lake, nestled within a striking cirque surrounded by dramatic mountains. The trail is generally well-maintained and clearly marked.
The primary attraction is Upper Seymour Lake itself, a pristine, clear alpine lake. Further up, Goat Flat provides expansive, breathtaking panoramic views of the surrounding mountains. You'll also be traversing a section of the iconic Continental Divide Trail (CDT) within the beautiful Anaconda-Pintler Wilderness.
Yes, dogs are allowed on the trail. However, since the route is within the Anaconda-Pintler Wilderness, dogs must be kept on a leash at all times to protect wildlife and ensure a pleasant experience for all visitors.
Hiking in the Anaconda-Pintler Wilderness, which this trail traverses, generally does not require specific permits or entrance fees for day use. However, if you plan to camp overnight, wilderness regulations may apply, and it's always best to check with the local forest service for any current requirements or restrictions. There is a visitor registration box at the wilderness boundary about two miles in.
The best time to hike to Upper Seymour Lake is typically during the summer and early fall months, from late June through September, when the snow has melted and the weather is most favorable. Wildflowers are abundant in early to mid-summer. Always check current trail conditions before heading out, especially in spring or late fall.
Yes, Upper Seymour Lake is a popular spot for overnight backpacking and camping. As it's within the Anaconda-Pintler Wilderness, please adhere to Leave No Trace principles and any specific wilderness camping regulations, such as proper food storage and campfire restrictions.
Yes, the Upper Seymour Lake via CDT trail is part of the much larger and iconic Continental Divide Trail (CDT). Specifically, it covers 100% of the "CDT - Idaho & Montana Section" and "cdt-x" routes, making it a segment of a significant long-distance hiking path.
Yes, the pristine, clear waters of Upper Seymour Lake are a major draw, offering opportunities for refreshing dips. It's also known for fishing, with rainbow and cutthroat trout present. Remember to follow all local fishing regulations and obtain any necessary licenses.
When hiking in the Anaconda-Pintler Wilderness, it's important to remember that it's a designated wilderness area. This means vehicles, including bicycles, are not permitted, preserving its natural state. Dogs are allowed but must be kept on a leash. Always practice Leave No Trace principles, pack out everything you pack in, and be mindful of wildlife.
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