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Valley County

Loon Lake Loop Trail

Hard

5

hikers

Loon Lake Loop Trail

05:14

18.9km

330m

Hiking

Embark on the Loon Lake Loop Trail, a difficult 11.8 miles (18.9 km) hike that promises a rewarding journey through Idaho's Payette National Forest. You will navigate diverse terrain, transitioning from lush woodlands to expansive open meadows, all while gaining 1090 feet (332 metres) in elevation. The route follows the scenic Secesh River, where you might catch a glimpse of salmon, before culminating in the pristine alpine vistas of Loon Lake, framed by the majestic granite crests of the Salmon River Mountains. Expect to spend around 5 hours and 14 minutes completing this challenging loop.

When planning your visit, be aware that conditions can vary significantly along the trail. Certain sections, particularly around the southeastern shore of Loon Lake, are known to be swampy, so waterproof footwear is advisable. You should also be prepared to encounter downed trees that may require navigating around or over, and be ready to cross creeks, especially during wetter seasons. Always check local conditions before heading out to ensure a safe and enjoyable experience on this demanding route.

Beyond the natural beauty, the Loon Lake Loop Trail offers a unique historical point of interest: the well-preserved wreckage of a B-23 Dragon Bomber. This aircraft crash-landed on the frozen lake in 1943 and its remains are still visible near the shoreline, providing a poignant reminder of the past. While reaching the crash site may involve a detour onto an unmaintained path or some bushwhacking, it adds a distinctive layer of exploration to your adventure in this rugged and beautiful wilderness.

Last updated: April 23, 2026

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18.9 km

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Way Types & Surfaces

Way Types

15.1 km

3.84 km

Surfaces

13.5 km

3.85 km

1.57 km

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Elevation

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Highest point (1,840 m)

Lowest point (1,690 m)

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Wednesday 20 May

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Frequently Asked Questions

What is the difficulty level of the Loon Lake Loop Trail?

The Loon Lake Loop Trail is generally considered moderate to intermediate in difficulty. While it features smooth and gradual paths, hikers should be prepared for rolling hills, some steeper sections, and potentially primitive areas with downed trees or creek crossings, especially on the south side of the lake.

What are the main points of interest along the route?

The most notable feature is the well-preserved wreckage of a B-23 Dragon Bomber that crash-landed on the frozen lake in 1943. Beyond this unique historical site, you'll experience stunning natural beauty, including the picturesque Secesh River, expansive meadows, and the pristine alpine Loon Lake framed by the granite crests of the Salmon River Mountains.

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

The best time to hike the Loon Lake Loop Trail is typically from late spring through early fall. During these months, the weather is generally favorable, and the trail is free of snow. Be aware that some sections, particularly around the southeastern end of the lake, can be swampy, especially after heavy rains or snowmelt.

Are dogs allowed on the Loon Lake Loop Trail?

Yes, dogs are generally allowed on the Loon Lake Loop Trail as it is located within the Payette National Forest. However, they must be kept on a leash to protect wildlife and ensure a pleasant experience for all trail users. Always practice Leave No Trace principles, including packing out pet waste.

Do I need any permits or pay entrance fees for this area?

As the Loon Lake Loop Trail is located within the Payette National Forest, no specific hiking permits or entrance fees are typically required for day use. However, if you plan to camp overnight, you may need a permit for dispersed camping or a reservation for designated campgrounds. Always check the Payette National Forest website for the most current regulations before your visit.

What is the terrain like on the Loon Lake Loop Trail?

The terrain is quite varied. You'll encounter a mix of smooth, gradual paths, rolling hills, and some steeper ascents. The trail winds through lush regrowth, dense woodlands, and open meadows. Be prepared for potentially swampy sections, especially near the lake, and possible downed trees or creek crossings that may require scrambling.

Where can I park to access the trailhead?

Specific parking details for the Loon Lake Loop Trail are not provided in the available data, but trailheads in national forests typically have designated parking areas. It's advisable to check the Payette National Forest website or local ranger stations for the most up-to-date information on trailhead access and parking availability before your trip.

What kind of wildlife might I see on the trail?

The area is rich in diverse flora and fauna. Hikers have reported sightings of various wildlife, including bears, moose, and deer. Keep an eye out for salmon in the clear waters of the Secesh River, and enjoy the diverse plant life throughout the forest and meadows.

Does the trail intersect other well-known paths?

Yes, the route also passes through sections of the Secesh River Trail and the Loon Creek/Loon Lake trail. You'll also find portions of the Loon Creek Trail Loop and the Duck Lake Trail intersecting or running concurrently with parts of the main loop.

Is there a recommended direction or starting point for the loop?

While the trail can be hiked in either direction, it's worth noting the differences in its segments. The north segment (Trail #081) is often described as smoother and more gradual. Conversely, the Loon Creek Trail (#084) on the south side of the lake is designated non-motorized and sees less use, potentially offering a more primitive experience. Consider your preferred terrain and difficulty when choosing your starting point and direction.

Can families with children hike the Loon Lake Loop Trail?

The trail is generally manageable for families with older children who have some hiking experience. While many sections are moderate, be aware that certain parts can be primitive, involve creek crossings, or have steeper grades. The overall length of nearly 19 km (11.8 miles) and difficult rating should be considered for younger children.

Nearby routes

Hard

5

Loon Lake Loop Trail

05:14h

18.9km

330m

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