Here’s the road (from Peach Springs)to the Colorado.
https://www.youtube.com/watch?v=VQdmFvBOeGw
From that darn Wiki, “...Diamond Creek Road is graded in the river canyon adjacent to, and in some cases, within the streambed of Diamond Creek. Diamond Creek Road provides the only vehicular access to the Colorado River between Lees Ferry, 225 miles upriver and Pierce Ferry, 52 miles downriver.[1] This access makes Diamond Creek a popular location for whitewater rafting trips to take out from trips through the Grand Canyon. Rafting trips also launch from the same location and proceed downriver to Lake Mead. The Hualapai tribal government charges a fee for all vehicles and people traversing the road...”
That is the road mentioned. Peach Springs to Mesquite Spring past Point Sublime and on to the river. 21.5mi (maybe to be built in 1913)
I can’t believe I didn’t travel it. Thanks