Here Is My One Photo That Shows the Road Slightly Curving Around The Giant Rock.
….Look Closely, You Can See The Road Left Of The Rock, Then Change Direction Slightly At The Right Side.

….“We’re headed southwest, have picked up a tail wind, and we feel better because of it. The road starts to wind up into the pass.
,,,,All traces of the east are gone now, at least in my imagination. All the rain here comes from Pacific winds and all the rivers and streams here return it to the Pacific. We should be at the ocean in two or three days. ,,,,“ (Cont.next)

Fifteen miles West of Lolo, MT. My notes say “Gusty Headwind”. This is opposite the narrator’s reported wind direction.

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(Photo = 109-1033c ...... ZMM Page = 242 ...... WayPt = 260w 4241ft) ***********