Unlike the rest of the US, Alaska is covered by USGS 1:63,360 maps. In addition to that, 1:250,000 maps exist. The information is free or nearly free, as the map data is public domain. Printed maps go for $9-10.
1:400,000 Topo map: National Geographic Trails Illustrated map
1:250,000 Topo maps: University of Texas at Austin