Targhee Pass on route 20
Will be camping in Idaho Falls before heading to Yellowstone N.P. How is the drive on route 20 over Targhee Pass into W. Yellowstone? We're pulling a 30' 5er with my 2015 GMC 2500 4X4 (gas).
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There's a scenic loop off of 20 that takes you past Mesa Falls. I don't how it would be in a big RV.
