Of course I'm a bit biased from living in Alaska. For many areas outside town, the best available topo maps date from the '50s and '60s, and are at 1:63,360.
This is similar to Canada, while the maps may be newer (and are undergoing updating) we only have 1:50,000 topo maps that are widely available. I've seen a couple private 1:20,000 & 1:35,000 maps, but only for a few limited areas.