Larry,
From the Lake Tahoe area I'd take the 80 east to the 93. Then 93 north to the Twin Falls, ID area. Hit the 84 east to the 86 east to the 15. Then the 15 north to the Idaho Falls area and take the 20 north. The 20 will take you right into West Yellowstone. We've taken this route at least 2 times and I remember that it was a relatively easy route. Not too bad with the grades and curves. One time we were just in the truck and the 2nd time with the trailer in tow. Should be a good route this time of year. Good luck. Dennis
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