This is the route that Katie and I followed on our roadtrip.

Day 1: Missoula to Boise via Hwy 12

Day 2: Boise to SLC to visit MattDay 3. SLC to Capital Reef National Park

Day 4: CRNP to Bryce Canyon National Park
Day 5: BCNP to St. George/Larry via Zion National Park and Angel's Landing

Day 6: Snow Canyon State Park
Day 7: St. George to Death Valley via Las Vegas, Hoover Dam and the Mojave Desert
Day 8: Death Valley to Mammoth Lakes/Sarah Patrick via Scotty's Castle
Day 10: Mammoth Lakes to Nowhere Nevada via Carson City and South Lake Tahoe.

Day 11: Nevada to Boise in the snow and ice
Day 13: Boise to Missoula via Hwy 20, I-15 and I-90