Information About

Twentymile Slough

Twentymile Slough

Quick Facts
Region:
  • Matanuska-Susitna
Nearest City:
Elevation:
  • 75 ft (22.86 m)
About

anabranch of Yentna River, flows SE 50 mi. NW of Anchorage, Cook Inlet Low.

History of Twentymile Slough

Local name reported in 1954 by U.S. Geological Survey (USGS).