Dave – Is the Beartooth Highway open in June?
There is a reason the Beartooth Rendezvous is held in August:
Should also check Glacier National Park.
Better to be safe than sorry.
I’m thinking about going through Bishop, Boise, Missoula (via Lolo). Not sure about intermediate points yet, but no (or few) “I” roads, camping, ~10 days round trip.