Meadow Creek flows 35 miles dropping over 4,500 feet through a remote region of Idaho. The run is tiny at the top and is a large creek by the time it enters the Selway. A significant part of the river corridor has no trails near the river, and the run contains multiple portages and sections of Class IV an V whitewater, alternating with sections of class II and III whitewater. The river is almost entirely in an inventoried roadless area, lacking formal protection.
Paddlers usually take 3 days to do this run, but it has also been done in 2. Leave plenty of time for the shuttle, and be sure that the roads are clear of snow.
For photos and a great story about Meadow Creek, check out this AW article from the mid nineties.
http://www.americanwhitewater.org/content/Journal\_show-page\_issue\_2\_year\_1994\_page\_42\_