Nenana River

About

Nenana River, Alaska — Ice Classic Confluence, Alaska Railroad History. The Nenana runs on glacial meltwater. Its USGS gauge, 15518040, records an average of about 4,200 cubic feet per second, with historic flows near 3,780 CFS. Boaters find the river optimal between roughly 3,000 and 15,000 CFS, and its rating spans Class II through V depending on the reach. For its first miles the water carries the cold and sediment of the Alaska Range itself, draining the range's south side within a watershed that includes views of the Muldrow Glacier on Denali.

The river divides cleanly into three characters. The Upper Nenana, from Cantwell to McKinley Village, is a 50-mile Class II scenic float. Below that, the Nenana Canyon near Healy delivers ten miles of Class IV whitewater—the stretch that anchors the region's commercial rafting industry, run today by operators such as Denali Raft Adventures and Nenana Raft Adventures. From Healy to the Tanana confluence, the Lower Nenana settles back into 80 miles of Class II. In total the river spans the Denali Borough and the Yukon-Koyukuk Census Area.

People have moved along this corridor for millennia. The Nenana served as a travel route between Ahtna Athabascan communities in the upper Copper River basin and Tanana Athabascan villages on the Tanana River. Its name in Athabascan means "a good place to camp between the rivers." The watershed sits within traditional Tanana Athabascan territory, and the community of Nenana today hosts the regional offices of the Tanana Chiefs Conference.

Sustained Euro-American contact arrived with the mineral rush of the early twentieth century. The 1902 Fairbanks gold discovery drew traffic north, and in 1903 Jim Duke founded a trading post and roadhouse at Nenana to service riverboat supply traffic up the Tanana. But the river's deepest fame rests on the wager born in 1917, when Alaska Railroad surveyors put up $800 betting on when the ice would disintegrate on the Tanana at Nenana. The Nenana Ice Classic has continued annually ever since, the formal lottery growing from an informal tradition that NSIDC analysis of historic records traces back to 1906.

Steel remade the town almost overnight. When the bridge across the Tanana at Nenana was completed in 1922 as the final Alaska Railroad link between Seward and Fairbanks, it transformed the community from a river-steamer port into a rail hub. The following year the Mears Memorial Bridge—a 700-foot steel-truss span that stood as the longest bridge in Alaska for decades—carried the railroad across the Nenana at Nenana, opening the Tanana Valley to settlement and establishing the whitewater-rafting industry in Nenana Canyon. Well before the railroad, the watershed had a working history: from the 1830s through the 1920s it was logged to support the regional timber industry and railroad expansion, until the exhaustion of old-growth stands around 1910 and the rise of state forestry conservation ended large-scale cutting.

Today the Nenana carries an ADF&G Recreational River designation and runs along the Denali National Park boundary corridor. It supports king salmon, chum salmon, and Arctic grayling. The community at its mouth remains a Yukon-Tanana river boat-tour staging point—both a working corridor and, each spring, the stage for that enduring gamble against the break-up.