Update: In the comments, Ed gives the links to the government of Canada’s scans of the Canadian National Topographic Series maps. The links allow downloads of the maps sheets at 1:250 and 1:50 scales. Thanks Ed!
‘Free Printable Topo Maps‘ offers topographical maps of Canada and the United States for, believe it or not, printing.
Recently, this site has allowed me to look up geographical names without digging out or buying topographical map sheets. I now find the site to be an invaluable index of geographical data at my field site in northern BC.