English: The Fortymile River is a clear water stream whose six main forks and their tributaries flow out of the Yukon-Tanana Uplands east of the Mertie Mountains and north of the Tanana State Forest. As the site of Alaska's first major gold rush in 1886, the history of the area is written in the cabins and mine workings along the stream. Named by gold prospectors for joining the Yukon River about 40 miles below Fort Reliance, an old Canadian trading post.