Nowitna River, River in the Kuskokwim Mountains, Alaska, US

The Nowitna River is a river in Alaska's remote interior, rising in the Kuskokwim Mountains and flowing northeast until it joins the Yukon River near the village of Ruby. Its upper section runs through a narrow limestone canyon before the river opens into wide forest and wetland country.

The Nowitna River was used for generations by Indigenous peoples and later by trappers as a route through the Alaskan interior. In 1980, roughly 360 kilometers of it were designated a National Wild and Scenic River under federal protection.

The Nowitna River draws local residents who fish for king salmon, chum salmon, and northern pike at different times of year. For the communities near the Yukon, catching and preserving fish from this river is part of everyday food life.

The upper canyon section has rapids that require paddling experience and proper gear, while the lower stretches are more accessible for canoes and kayaks. This river runs through one of the most remote areas in Alaska, so planning ahead and carrying enough supplies is essential.

The Nowitna Canyon, between Mastodon Creek and the Big Mud River, is the only stretch with Class II rapids; the rest of the 250-mile river is slow and meandering, rated Class I. Upriver winds, especially on the lower reaches, can make navigation difficult.