Paddling in Katmai National Park

Katmai sits on the Alaska Peninsula, a roadless wilderness of more than four million acres where every paddler arrives by floatplane or boat.

The water here is not a single river system but a sprawling network — hundreds of miles of rivers and streams, large glacial lakes, and countless ponds — spread across active volcanic terrain.

The park's interior is accessible almost entirely by water or air, which means paddling here is less a recreational add-on and more a primary mode of travel.

The anchor of backcountry paddling is the Savonoski Loop, an 80-mile circuit through the park's interior that draws canoeists and kayakers willing to commit five to ten days to the route.

The loop threads together Naknek Lake, Grosvenor Lake, the Grosvenor River, and the Savonoski River.

Grosvenor is a long, narrow lake that curves beneath tall mountains; its outlet feeds the Grosvenor River, a Class I, clear-water stream roughly three miles long.

The Savonoski River that follows is braided Class I–II with a swift current and waves up to three feet — not technical whitewater, but demanding in its own way: glacial silt makes depth impossible to read, sandbars shift, and sweepers appear without warning.

The loop requires intermediate paddling skills and real wilderness experience, including bear country travel. A 1. 5-mile portage trail at Fure's Cabin connects Naknek Lake to Grosvenor Lake; expect mud and insects.

Williwaws — strong south and east winds — can pin paddlers on Grosvenor Lake for hours or days, so build extra time into any itinerary.

Naknek Lake is the park's largest body of water, over 150,000 acres, and the most accessible starting point for most paddlers.

Brooks Camp, on the lake's shore, is the park's main hub; canoes and kayaks are available for rent there through the park concessionaire.

The Iliuk Arm of Naknek Lake connects the Savonoski River mouth back to Brooks Camp — roughly 20 miles of open lake travel where steep cliffs along Mount La Gorce push paddlers to the south shore.

For moving water, American Creek and Moraine Creek are the rafting destinations. American Creek in particular is described as a serious wilderness float with whitewater and strong fishing. Funnel Creek rounds out the whitewater options.

The coastal side of the park adds a different dimension: Geographic Harbor offers sea kayaking among columnar basalt islands and river deltas.

One permit matters specifically to paddlers stopping at Brooks Camp: the Brooks River Corridor permit, required for anyone entering the corridor that includes the Brooks River and 50 yards from each bank upstream from camp.

It is free but required, and exists because bears and anglers share that short stretch of water in numbers that demand active management. Check with the park for current permit procedures before your trip.

Katmai's water is cold, winds are unpredictable, and the nearest help is a floatplane away. File a float plan, wear your PFD, and give the weather the respect it demands. The park rewards paddlers who come prepared to move slowly and wait.