North Fork Fortymile River
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. It is a major tributary of the Yukon River. The upper North Fork is a narrow, entrenched river, with few gravel bars. The uplands are dominated by open, moist tundra areas with little terracing. This section is extremely remote. It is reachable by helicopter or fixed-wing aircraft into a private airstrip on a ridge above Slate Creek and a 3 mile portage to floatable water. This section can also be r
River conditions are community-verified. CFS ranges, difficulty ratings, and access points may not reflect every flow level or seasonal change. Always check current conditions, scout unfamiliar rapids, and paddle within your skill level.