Originally Posted by
gamecock
Near Knoxville to Mammoth Cave National Park to connect with the Trans-Am to Missoula, then figure out how to get to Renton, WA.
There's a few different ways you can go. If you jump on US-12 in Lolo you can ride that all the way to Morton, Washington (US-12 runs from Aberdeen, Washington to Detroit, Michigan) and then take Highway 7 (aka Mountain Highway) north through Eatonville to Tacoma and then follow the sound to Renton.
Or you can follow the Interstate 90 corridor via the Trail of the Coeur d'Alenes.
Assuming you're riding into Renton...