Onion Valley Trail


Onion Valley Trail
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Near Scott Mountain and Onion Valley Trail #036

Onion Valley Trail - This trail heads north from Forest Service Road 555BC, also referred to as the the Scott Mountain Lookout Road.

The first part of the trail is a steep, treacherous decent, so use caution.

It drops down and crosses Lightning Creek where it joins the Lightning Basin Trail before it climbs up to the ridge and joins with the Alley Trail.

It follows the ridge, providing views of Scott Mountain and Lightning Basin, before descending to Onion Creek and intersecting with the Lightning Ridge Trail.

At a Glance

Rentals & Guides: Click here to download a "Print to Go" guide for Onion Valley Trail.
Usage: Light
Closest Towns: Garden Valley, Idaho
Water: None

General Information


From Boise, Idaho travel 38 miles north along State Highway 55 to Banks, Idaho. 

From Boise, Idaho travel 38 miles north along State Highway 55 to Banks, Idaho.  At the intersection with State Highway 17 (Banks/Lowman Road) turn east and proceed for 13.1 miles to the Forest Service Road 555 turnoff.

Turn left, heading north on FS Road 555 to the junction with FS Road 555BC.

Turn left, heading west on FS Road 555BC for approximately 3.3 miles to the trailhead.

The trailhead is on the north side of the road. Parking is very limited at the trailhead

Recreation Map

Map showing recreational areas. Map Information



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Horse Riding & Camping

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OHV Riding & Camping

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OHV Trail Riding

Make sure you have your Emmett Ranger District Motor Vehicle Use Map (MVUM) for information about open OHV trails in the area.

Difficulty Level: Most Difficult
Areas & Activities


  Area/Length : 
5.5 Miles

  Latitude : 

  Longitude :