The Going to the Sun Road has a 21 foot restriction above Avalanche Campground on the Lake Macdonald side and above Rising Sun on the St. Mary's side. Rt 49 between Two Medicine and Rt. 89 is also limited to 21 feet. There is major construction and fairly long delays between Browning and St. Mary's on Rt. 89, so Rt. 464, rhe Duck Lake Road is a betrer choice if you're coming into St. mary's.
Anything over 21' have to stop at Avalanche Lake, Trail of The Cedars
You would not want to bring a large rv or motor home on the sun road very narrow road. Very crowded..
We were there last week and most travel restrictions were lifted. There are some restrictions for large campers especially on the Going to the sun road, they can only get so far on the road.
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