Join Date: Mar 2005
Location: Calgary, Alberta, Andorra.
Interest: hiking, backpacking, scrambling, climbing
Are you comfortable off-trail? The David Thompson Highway - Owen Creek - Michele Lakes - Pinto Lake - Cataract Valley and on route doesn't require reservations and can take 4-5 days, with the exact route and endpoint depending on how many days you want to do and how far you want to walk each day. Beautiful country.
Otherwise, many of the other big Rockies trips do tend to need reservations (Bow Valley Highline, Skyline, Robson, etc.)