I really appreciate all of the detailed information here, tks. Looks like the Wind River Range in en route in Wyoming. Presuming I make it that far, in Colorado I shall incorporate a crossing over Monarch Pass if doable. 35 years ago I crossed Monarch Pass on a motorcycle en route to Idaho from Texas, I remember the smell of antifreeze from laboring vehicles and the fact that my wrist got sore from twisting the throttle to get around successive lines of cars backed up behind slow-going RV's.