20 (or so ) Awesome Places in Idaho and Montana Sometimes the places I explore don't fit into one particular field trip, so I put them into a post like this. Enjoy! Eastern Idaho The Snake River where it enters its namesake Snake River Plain in eastern Idaho. The river here is a hybrid braided and meandering -- meandering because of the low topography, and braided because of its seasonal heavy sediment load. The current is fast enough for terrific fishing and boating, but slow enough to be easy. Location: between Rigby and Ririe, Idaho.