rate increases, and the Nenana becomes a Class I to II (medium) stream for the between Windy Station and McKinley Village Lodge. The most difficult whitewater, for experts only, occurs over the next , in Nenana Gorge between McKinley Village and Healy, and is rated Class IV (very difficult). Below this, the river is Class I or II all the way to Nenana. Dangers include extremely cold swift water, Class IV rapids in the gorge, overhanging trees along the upper river, and overhangs, logjams, and braids on the lower river. An additional danger at the river mouth involves following the wrong braid, missing the take-out at Nenana, and being swept into the Tanana River, from which it may not be possible to exit until reaching Manley Hot Springs, further downstream. Crossings See also List of rivers of Alaska References External links Nenana Wildwater Festival Fairbanks Paddlers Alaska Range Rivers of Denali Borough, Alaska Rivers of Matanuska-Susitna Borough, Alaska Rivers of Alaska Rivers of Yukon–Koyukuk Census Area, Alaska Tributaries of the Yukon River Rivers of Unorganized Borough, Alaska Tanana Athabaskans