Rushmore to Fishing Bridge - Yellowstone

wooey wrote:
...US 20 to 26 to South Entrance looks like less miles -- It's OK for RV and a truck with travel trailer?...

We have done it and all the other routes I mentioned pulling a 7500# trailer with a 2500 Duramax pickup. There will be some pulls no matter what route you take to Yellowstone. Just driving through the park you may cross the Continental Divide a number of times. In my opinion and experience, the most challenging route is through the Northeast Entrance (which I did not mention in my first post) and would not recommend it for larger RVs to other than those with lots of mountain driving experience.