For the Canadian parks, the best topographical maps are produced by Gem Trek Publishing (www.gemtrek.com). Maps range in scale from 1:35,000 to 1:100,000 and cover Banff and Mt Assiniboine, Jasper and Maligne Lake, Waterton Lakes, Lake Louise and Yoho, Bow Lake and Saskatchewan River Crossing, the Columbia Icefield, Canmore and Kananaskis Country.
All major trails and points of interest are clearly marked on the maps, which are waterproof and tear-proof (although in practice they’ll only take so much punishment). They’re available everywhere, including from retail stores, bookstores, grocery stores and many gas stations.
National Geographic’s Trails Illustrated series offers topographical, waterproof, tear-proof maps of Glacier and Waterton Lakes (the smaller maps within this series that only cover a region such as Two Medicine Valley are recommended because they include water hazards), while the United States Geological Survey (USGS) publishes a 1:100,000 topographical map for Glacier National Park.
Map Art Publishing (www.mapart.com) produces a range of road maps covering the Canadian Rockies.
Note that Lonely Planet's maps aren't intended for serious backcountry hikes; we highly recommend you purchase one of the options above.