Not to be confused with the Castle Creek trail near Prescott, this refers to the creek off Castle Hot Springs road in the Hell's Canyon wilderness. Visited today scouting for narrows and found some good stuff, though private property lines make access difficult. Pancho Doll's book "Day Trips with a Splash" has beta, albeit somewhat dated.
"Of course we weren't lost. We were merely where we shouldn't have been, without knowing exactly where that was."