There a few great things you can do in while you're in Jasper area, and the best of them can put you into close proximity to a true unspoiled wilderness. 

First and foremost, there's  the Icefields Parkway, one of the most spectacular drives in the world and part of the reason that Canada's mountain parks are a World HeritageSite. Most people do it either when going to Jasper from Banff, or when driving in the opposite direction. Take plenty of time no matter which way you go, and stop at some of the many beautiful viewpoints. Athabasca Falls is a great stop, then Sunwapta Falls. Both are very close to the highway and are easily accessible. You will also pass numerous scenic lakes - take a few moments to stop and walk around.

Eventually, you will get to the Columbia Icefields at the south end of Jasper National Park . Avoid the expensive tourist traps at the Icefields Centre, and walk to the toe of the Athabasca Glacier. Even in summer, you will want to bring a sweater. Keep going and you will immediately find yourself in Banff National Park  headed for the Banff townsite and Lake Louise.

But in the Jasper area, begin with a stop at the Information centre in the heart of the town. They have maps and up-to-date information on the trails and other attractions around the town. The Tramway is always a favourite - ride the tram up, then walk the extra 600 metres to the top! For a scenic boat ride you can drive to Maligne Lake, or you can go whitewater rafting on the Athabasca River. 

Difficulty levels for hikes range from short and easy walks, some wheelchair accessible, at places like nearby Pyramid Lake, to multiday backpacking trips like the famous Skyline Trail. See reviews on Trip Advisor, and if you can't find one for the hike you're interested in, contact Parks Canada.The whole family will enjoy a trip to Maligne Canyon, and the more ambitious might get a kick out of climbing the Sulphur Skyline Trail at Miette Hot Springs. 

Be aware though that while the trails are usually well-travelled and quite safe, this is still a mountain wilderness. Stay on marked trails, pay attention to any warnings about animal activity, travel in groups, and don't let children stray.