Yes, down there in the flats is very flat, and you will see bison, elk (wapiti), deer, and cattle grazing. It's pretty easy to cut across, and there are lots of game/cattle trails.
Thanks. People keep calling it rough terrain and that it would be impossible to hike the snake river to Coulter bay. I just don't see that. I don't even think it would take two full days to do it.