I WILL be going here!
Region: Southern Montana and Northern Wyoming east of Yellowstone National Park
Length: 64 miles
Endpoints:Red Lodge, MT & Cooke City, MT
Features: A huge plateau above 10,000 feet with alpine lakes, glaciar-carved cirques and fragile tundra
Side Activities: Hiking, fishing, 4-wheeling
Here's a website with more pictures of the area.
