Kuskokwim River Professional Review and Guide
"Second in size to the Yukon River, and nearly paralleling it southwesterly to the Bering Sea, the Kuskokwim is one of Alaska's greatest rivers, draining 50,000 square miles. Several large tributaries drain into this mighty river, which flows 540 miles to the sea.
The North Fork Kuskokwim River begins in the rolling hills of the Kuskokwim Mountains and flows 260 miles to meet the South Fork just above the village of Medfra. The East, Middle, and South Forks drain extensive silty flats. The South Fork flows 152 miles to its confluence with the North Fork. These forks are sluggish, meandering bodies of water, characterized by many oxbows. The main Kuskokwim River officially begins at the junction of the North and South forks above Medfra. From here the river is wide and meandering, flowing through forests of spruce, birch, and willow and across swampy wetlands."