Waterton Lakes National Park of Canada
On hot summer days, some people swim in Upper Waterton Lake. Keep in mind that the lake is very cold, drops off quickly and is subject to strong winds. Emerald Bay (in the community) is the most popular spot for swimming. The beach near the Townsite campground is also used but tends to be windier. The Marquis Hole picnic site along the Waterton River is also a popular spot for swimming. Be aware that "swimmer's itch", a small parasite that causes itching and irritation, is present in some smaller water bodies, particularly Linnet Lake. The pool at the Waterton Lakes Lodge is accessible for public use.