Wow I screwed up my math on the park size! It is a park in that it is a protected area of land and all its inhabitants are protected. There is a small community of just under 5000 people with some stores etc but other wise it is wilderness and you can enjoy but nothing is to be harmed or removed. Its awe inspiring to see the plants and animals able to thrive in that elevation but they do. There is both prey and predators which live naturally in the parks but since they've never had guns pointed at them they don't run like heck when you point a camera at them which was wonderful. Parks Canada has used the park fees well and the bridges, walkways, info etc is well maintained with as little change to the natural landscape as possible while keeping us humans safe.
Jasper is like Yellowstone park (I was there as a teenager).
Jasper
10,878 km sq (4,200 sq mi)
Banff
6,641 km sq
(2,564 sq mi)
Yoho 1,313 km sq (507 mi sq) west of Banff
Kootenay 1,406 km sq (543 sq mi) also west of Banff
Mt Robson 2,249 km sq west of Jasper (BC)
All these parks are together so wildlife can move without ever leaving protected lands. 2 big ones are in Alberta and the other 3 in British Columbia
Yellowstone (
3,472 square miles) 8,987 square km