Claim: The Kasilof River starts at Tustumena Lake, Alaska's eighth largest lake with a depth of 950 feet, and flows to Cook Inlet in South-Central Alaska.
Evidence: It begins at Tustumena Lake and flows northwest to Cook Inlet near Kasilof. South-central Alaska 950 feet (290 m) At 73,437 acres Tustumena Lake is Alaska's eighth largest lake and the largest lake on the Kenai Peninsula.