THING TO DO

Grassy Lake Road

A river with mountains in the background.

The Grassy Lake Road connects Flagg Ranch to Ashton, Idaho. Folllow the road from the John D. Rockefeller Jr. Memorial Parkway into adjoining US Forest Service land. Please use caution on this dirt road. High clearance vehicles are recommended, and the road is closed for grizzly bear migration until June 1. Sections of the road may open later depending on conditions.

Along the road are eight camp areas including 20 campsites. Campsites are free on a first-come, first served basis. Each camp area includes a vault toilet and bear boxes.
Details
The Grassy Lake Road is a 36 mile gravel road. 
Pets are allowed in campgrounds and along the road (must be on a leash of 6 feet or less) until the road enters Forest Service lands, then follow Forest Service guidelines.
Accessing the road from north or south requires paying the park fee for Grand Teton or Yellowstone.
Grassy Lake Road is accessible from Flagg Ranch.
Grassy Lake campsites are available on a first-come, first-served basis after June 1.
Grassy Lake road opens June 1 and closes for snow in the winter. Grassy Lake road is not plowed during the winter.
Accessibility Information
Use caution on this dirt road. High clearance vehicles are recommended, and the road is closed for grizzly bear migration until June 1. Sections of the road may open later depending on conditions.
A river with mountains in the background.
Grassy Lake Road parallels the Snake River.

NPS Photo/J. Bonney

The Grassy Lake Road connects Flagg Ranch to Ashton, Idaho. Folllow the road from the John D. Rockefeller Jr. Memorial Parkway into adjoining US Forest Service land. Please use caution on this dirt road. High clearance vehicles are recommended, and the road is closed for grizzly bear migration until June 1. Sections of the road may open later depending on conditions.

Along the road are eight camp areas including 20 campsites. Campsites are free on a first-come, first served basis. Each camp area includes a vault toilet and bear boxes.

Last updated: January 21, 2021