Here's an image by Q.T. Luong from Specimen Ridge.

I've been researching hikes in the Yellowstone area.

Certainly, the Grand Canyon of the Yellowstone

should be on the short list, go see Q.T.'s images!!!

Some candidates [so far] for the death march:

- Black Canyon of the Yellowstone [12 miles]

- Bighorn Peak [14 miles]

- Osprey Falls [9.2 miles]

- Fan Creek [5-11 miles]

- Sevenmile hole [10 miles]

- Upper Gallatin valley [9-13 miles]

Anyway, add some ideas!