Last updated: April 1, 2021
Thing to Do
Raft the Aniakchak River

NPS Photo/T. Harmon
What is it about Alaska's rivers that call to you? The expansive wilderness? The challenge and adventure? The excitement of something new? The sheer immensity of the landscape? Aniakchak River has it all.
Congress designated Aniakchak River a National Wild River in 1980. Spectacular scenery and remoteness make rafting this river a rewarding experience. From Surprise Lake, the river flows a peaceful mile (1.6 km) to The Gates. The river moves swiftly through this narrow gorge in the caldera wall, and large rocks demand precise maneuvering. A gradient of 75 feet per mile (14.2 m/km) makes this section challenging. After a more gentle 10 miles (16.1 km) rafters arrive at the confluence with Hidden Creek where car-sized boulders, abrupt bends, and a narrow bed require extreme caution. After 5 more miles (8 km), the river slows as it meanders toward the Pacific Ocean and the seals, sea otters, bald eagles, and sea birds of Aniakchak Bay. Bears can be seen all along the river.
Are you contemplating the trip? Aniakchak River challenges even the most experienced river runners. Only a few parties float the river each year, mostly in July. Aniakchak’s weather is often severe. Strong winds and cold temperatures can appear suddenly. A hefty budget and pre-tested skills are absolutely necessary. Plan on delays getting in and, especially, getting out. The river is dynamic; conditions often change rapidly. Bring durable, field tested equipment. Inflatable rafts 12–13 feet (4 m) long with rowing platforms are most popular, but smaller packrafts are also used. Dry suits are recommended; life jackets are required. Scout The Gates and Hidden Creek confluence before you run them. Total float time is 3–4 days from Surprise Lake to the bay.
Those who visit enjoy rafting the Aniakchak River, hiking the caldera floor, and sport fishing usually work with a guide service.