The restrictions for the going to the sun road .there are many turns on it thats why there is a restriction on that road.but you can get into the two medicine area and many glaciers area.also be able to go to lake McDonald area just won't be able to go to top of mnt in ur own vehicle but there are tour busses that go up there alike the sun tour busses that are given by blackfeet native American guides
They have restrictions for a reason
It honestly depends on where you're going. No one is going to measure you at the gate
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