The Belly River drains the northeast section of the park. The river flows north into Canada. The closest community is Babb, which is nine miles north of the Saint Mary Entrance.
Overnight camping requires a permit.
Elizabeth Lake is the most popular backcountry destination both for its beauty and fishing opportunities. For this reason hikers are restricted to only one night at Elizabeth Lake. The parking lot is large and includes a hitching rail and designated parking for stock trailers. Take Highway 89 from Saint Mary. About four miles north of Babb, turn left on Route 17, the Chief Mountain International Highway.