extends W on S bank of Boulder Creek, 26 mi. ESE of Tanana, Yukon-Tanana High.
Local name reported in 1952 by U.S. Geological Survey (USGS).
Roughtop Mountain, Senatis Mountain,
Rapids:Ridges:Bean Ridge, Boulder Ridge, Serpentine Ridge, Serpentine Ridge,
Streams:Streams:Big Denver Creek, Cache Creek, Camp Creek, Deep Creek, Dome Creek, Jordan Creek, Little Boulder Creek, Little Denver Creek, Orum Creek, Quartz Creek, Queen Twin Creek, Ready Money Creek, Rock Creek, Salt Creek, Sandusky Creek, Sullivan Creek, Tamarack Creek, Trail Creek, US Creek, West Fork Trail Creek, Woodchopper Creek,
Valleys:California Gulch, Colorado Gulch, Dalton Gulch, Ferguson Draw, Harter Gulch, Hokeley Gulch, Idaho Gulch, Innesvale Gulch, Miller Gulch, New York Gulch, Tofty Gulch,
Cities: