heads at glacier terminus on Mount Mageik, flows W to Takayofo Creek, on Alaska Peninsula, in Katmai National Monument, 33 mi. WSW of Mount Katmai, Aleutian ra.; 25 miles long.
So named in 1923 by a U.S. Geological Survey (USGS) field party, commanded by R. H. Sargent, "because it is at the southwestern angle of the Katmai National Monument."