… As I see them.

Part One:

Phoenix to Watson Lake.
Taking the Colorado Route, and then up through the Tetons and into the Colorado Rockies. Riding the mountains whenever possible should be much cooler, although it may involve more rain.

Part Two:

Watson Lake to Fairbanks.
The wilds of BC, and the remoteness of the Yukon. Over the “Top of the World” highway and into Alaska at the highest border crossing in North America.

Part Three:

Fairbanks to Whistler.
Anchorage, Homer Spit, to Haines and a ferry to Skagway. Continue south on the Dease Lake Highway (one of the most remote areas of the trip) and into Whistler, BC.

Part Four:

Whistler to Phoenix.
Enter US in a remote part of the Washington Mtns, then west to Everett WA. From Everett we head to the Olympic Peninsula, coast of Oregon and Eureka, CA. Then turn east through the Sierras, and northern Nevada on the infamous highway 50. From Ely, we head southeast to southern Utah, and then down  the spine of AZ (highway 89) to Flagstaff and home on the 87 through Payson.