Russell Corfman posted the route:

The Black Canyon National Recreation Trail, or BCT, is a ~75 mile trail running North to South from the Prescott National Forest Boundary to the Carefree Highway. The trail is a multi-use pathway for hikers, cyclists, and equestrians. The trail follows ancient Indian pathways, Sheep herding migration paths, and stage coach routes. The trail was designated as a National Recreation Trail in 2008. There are two loops along the trail, so travelling end to end is about 75 miles.

This is a 30 mile loop in Big Bend National Park.

https://www.nps.gov/bibe/planyourvisit/bc_outermountainloop.htm

Difficulty: Strenuous; significant elevation changes and primitive trail
Distance: 30 miles (side-trips to the South Rim or Emory peak add up to five additional miles).
Time: Allow at least three days

Table Mountain (11,106') is on the west side of Grand Teton National Park. Speed ascents have been done via the North Fork route, which is about 6.5 miles one-way, and via the West Face route, which is more like 4 miles each way.  Either route, the summit affords spectacular views of the Tetons.