As Gary wrote, do *NOT* try the 22/33 route. If Trip Planner didn't scare you, the signage at the bottom of the route will.
It would seem the route from West Yellowstone through the park to the south exit is optimum. It is the route I have taken numerous times.
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Carl (n Susan)
There is more to life than fuel mileage.
2012 Montana 3700RL Big Sky Package towed by a 2015 Ford F350 6.7L PSD 4WD CC LWB
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