[3] Beginning in the Ahklun Mountains at Kagati and Pegati lakes, it flows westward into Kuskokwim Bay on the Bering Sea at the city of Quinhagak.

Below this, swift currents, braided channels, logjams, and overhanging or submerged vegetation make the float "not a trip for beginners.

"[4] In high water, the difficulty along the upper 55 miles (89 km) of the river may increase to Class III (difficult).

[6] The main game fish are rainbow trout, char, Arctic grayling, king (Chinook), silver (Coho), chum, and red (sockeye) salmon.

Anglers can float down from the headwaters, hire a boat to go upriver from Quinhagak, or fish near tent camps and lodges along the lower river.