"Trail of the Ancients" is actually a scenic/historic loop that runs through the 4 Corners area. The part you're looking at, Hwy 491 (formerly Hwy 666, which is what locals still call it), is an easy road. We run from Cortez to Farmington all the time (in fact, we're in Farmington right now) and we go from Cortez to Moab several times a year. Go west out of Farmington to Shiprock and then north on Hwy 491. This is all farily flat. The road is ok but look out for bumps and dips (it's in desperate need of realigning and resurfacing). Hwy 491 from Cortez to Monticello Utah is easy. You'll change elevation but nothing dramatic. From Monticello to Utah, Hwy 191 has a big downhill right outside of Monticello then you'll hit ups and downs in the canyon country. Hardest part of the trip from Monticello to Moab is keeping your eyes on the road and not on the scenery. Last time we were up that way, about 8 months ago, they were working on widening the roads. I hope they're finished by now but don't really know.
We'll be going back to Cortez tomorrow. Then up to Moab on Friday. Honk if you pass us by !!
Wendy
Farmington NM