Upper Waterton Lake, Lake in Waterton Lakes National Park, Alberta, Canada, and Glacier National Park, Montana, United States
Upper Waterton Lake is a long, narrow lake that crosses the border between Canada and the United States. It lies in a valley carved by glaciers, with steep sides and cold, deep water.
The lake was shaped by glaciers during the last ice age, which left the deep basin and steep walls seen today. In the early 20th century, the area became a national park, and the lake has since been a focal point for conservation and recreation.
The lake is a gathering place for boat tours and family outings, and people often stop at the shoreline to watch the light change on the water. On the Canadian side, the townsite of Waterton sits right at the lake's edge, and the water is part of everyday life for residents and visitors.
You can reach the lake from the town of Waterton by car or on foot, and several trails start near the shore. The weather changes quickly, so bring layers and check conditions before heading out on the water or on foot.
The lake is one of the deepest in the Canadian Rockies, and its water stays cold even in summer. A small stone marker on the shore shows the Canada-United States border, which runs straight through the water.
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