A short, easy trail with which to stretch your legs while driving through Kootenay National Park is the interpretive portion of the Simpson River Trail. The interprative portion of this trail is about a mile long one way, and the trailhead begins once you cross the bridge over Kootenay River. Once you reach the end of the interpretive portion of the trail, you can continue the trail, if you wish, into Mount Assinboine Provincial Park.