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Salmon River Trail

Salmon-Challis National Forest, Idaho · 3 min read

Distance
7.6 mi
Elevation Gain
600 ft
Difficulty
easy
Route Type
Out-And-Back
Best Season
April through November
Dog Friendly
Yes
Difficulty Score
2 / 10

Trailhead Amenities

Restroom
Vault Toilet
Parking
Free
Cell Service
Limited
Water
Nearby
Camping
None
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Conditions, regulations, and fees change frequently. Verify with the local ranger district before your trip. Full disclaimer

At a Glance

  • River-corridor hiking along the Main Salmon, the longest undammed river in the contiguous U.S.
  • Exceptional spring steelhead and summer trout fishing access
  • Canyon geology with exposed rock formations carved by the river
  • One of the most accessible trails near the town of Salmon
  • Year-round accessibility at low elevation

Overview

The Salmon River Trail follows the Main Salmon River near the town of Salmon in the Salmon-Challis National Forest, offering 7.6 miles of low-elevation canyon walking with consistent river access. The Main Salmon is the longest undammed river in the contiguous United States, a designation that means the river flows naturally through canyon terrain shaped by river forces rather than reservoir impoundment. Walking this trail puts you in direct contact with a river system that operates as it has for centuries.

Located in Idaho's Lemhi County, this trail serves as both a local recreation resource for Salmon-area residents and an orientation walk for visitors before heading into the more remote sections of the forest. The low elevation and minimal gain make it accessible from April into November in most years.

The Route

Trailhead to River Corridor (0 to 1.5 miles)

The trail parallels the Salmon River from the trailhead, staying close to the river through riparian willow and alder thickets. The canyon walls are visible across the river and the sound of the water is constant. Fishing access points are frequent in this section.

Mid-Canyon (1.5 to 3.5 miles)

The river corridor narrows and the canyon walls come closer. Rock formations expose the geology of the canyon in a continuous visual display of stratified rock and river-carved surfaces. The trail stays at river level and maintains the minimal grade throughout.

Upper Reach Turnaround (3.8 miles)

The trail continues at river level to the turnaround at a canyon bend where the river turns away from the trail system. Return via the same route.

When to Hike

April through November is the accessible season. Spring high flows make the river dramatic in May and June. Summer sees stable, calmer water and comfortable temperatures. Fall brings good fishing conditions and migrating birds along the river corridor.

Winter access is possible in most years given the low elevation, though some sections can be icy after cold snaps.

What to Bring

Many hikers carry a liter of water for this shorter route, supplementing with filtered river water if needed. Fishing gear and an Idaho license add significant value. Sun protection is important on the open canyon sections.

Trailhead Access

The trailhead is off Highway 93 south of Salmon, with paved access and a gravel parking area. No fee or permit is required (as of 2026). A vault restroom is present. Space for 15 to 20 vehicles.

Dogs are welcome and enjoy the river corridor.

Nearby

Salmon River Trail is the accessible front-country complement to the demanding wilderness trails of the Salmon-Challis. Williams Lake Trail adds an alpine lake experience from the same base in Salmon. Sacajawea Peak Trail provides the area's demanding summit option. For context on the wild and scenic designation, our checking conditions guide links current river conditions. Follow Leave No Trace principles at the fishing access points where concentrated use can degrade riparian vegetation.

Trailhead Parking

Gravel lot at the river access trailhead off Highway 93 south of Salmon. Space for 15 to 20 vehicles.

← Back to Salmon-Challis National Forest

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Frequently Asked Questions

How long does the Salmon River Trail take?
The 7.6-mile out-and-back takes most hikers 3 to 4 hours at a relaxed pace. The minimal elevation gain makes this one of the most accessible hikes in the forest, suitable for a wider range of hikers.
Is Salmon River Trail dog friendly?
Yes, dogs enjoy this river trail. Keep dogs out of the river during high-flow periods in spring when current is strong. In summer, the river is calmer in most sections along this trail.
Can you fish from the Salmon River Trail?
Yes. The trail provides fishing access to the Main Salmon River, which supports steelhead, chinook salmon, and various trout species. Idaho fishing regulations apply (as of 2026). A fishing license is required.