The road from Chihuahua through Creel to Batopilas descends 2,400 m through six biomes in 80 km of switchbacks. The Copper Canyon system is deeper and wider than the Grand Canyon. Tarahumara (Rarámuri) villages line the canyon walls all the way to the silver-mining town at the bottom.
Clone it to your planner, customize dates and stops, then ride. All free.