Ok, I just did a quick mileage calculation and found that skipping Yellowstone will only save about 18 miles. That is great because I was thinking of heading east instead of north to Yellowstone because it seemed out of the way.
So, that being decided, I will head north into the Teton mountains on rt 20 looks like there is a pass into Yellowstone at 7072. Nice.
Today, I am riding into Craters of the Moon. I am at 4800 Ft now and I know I will be over 6000ft before I get to craters. So, lots of uphill today. I can see the mountains, they are beautiful should be a great ride.