Bluejohn Canyon is a slot canyon in eastern Wayne County, Utah, United States. It is on BLM land just south of the boundary of the Horseshoe Canyon Unit of Canyonlands National Park. Bluejohn Canyon is probably named for a 19th-century outlaw by the name of John Griffith, who reportedly kept stolen horses in the area. He had one blue eye and o…Bluejohn Canyon is a slot canyon in eastern Wayne County, Utah, United States. It is on BLM land just south of the boundary of the Horseshoe Canyon Unit of Canyonlands National Park. Bluejohn Canyon is probably named for a 19th-century outlaw by the name of John Griffith, who reportedly kept stolen horses in the area. He had one blue eye and one brown eye and was known by the nickname "Blue John".