of Yukon River, extends SW 20 mi. from Garnet Island, 27 mi. NW of Tanana, Kokrines-Hodzana Highlands.
Descriptive name used in the late 1800's. "This canyon is one of the most beautiful and spectacular of the Yukon River."
Roughtop Mountain, Senatis Mountain,
Rapids:Ridges:Boulder Ridge, Raven Ridge, Serpentine Ridge,
Streams:Bear Creek, Canyon Creek, Jordan Creek, Larsen Creek, Larsen Creek, Little Boulder Creek, Orum Creek, Queen Twin Creek, Salt Creek, Sam Creek, Sandusky Creek, Stevens Creek, Texas Creek, Trail Creek, West Fork Trail Creek,
Valleys: