The Matanuska River is a glacial river located in south-central Alaska. It flows approximately 90 miles from the Matanuska Glacier in the Chugach Mountains to the Knik River, which eventually joins the Cook Inlet. The river is known for its stunning turquoise color, a result of glacial silt and minerals. The Matanuska River is popular for various outdoor activities, including fishing, rafting, and hiking along its banks. The surrounding area features beautiful landscapes, including mountains and forests, making it a favored destination for nature enthusiasts and photographers.