BEARTOOTH PASS / US 212
Red Lodge, Montana - Yellowstone
Beartooth Pass climbs southwest out of Red Lodge Montana to an amazing 10,974' before arriving at northeast entrance to Yellowstone National Park. Obviously snow and inclement weather can have a big impact on road conditions here, and the road is only open from May to mid-October.
Yellowstone National Park information about this road here.
How to find:
Summertime fun only, gates close in the winter.
Looks like fun to me.
That pretty much says it all.
Naturally aspirated vehicles need not apply at over 10,000 feet.