Ayer's Cliff is a village municipality in the Memphrémagog Regional County Municipality in the Estrie region of Quebéc, Canada. It is located just north of the Canada–United States border, on Lake Massawippi, near the mouth of the Tomifobia River.
Open Water Swimming
The Lac Massawippi is a 9-mile (14.4 km) marathon swimming competition in Lake Memphremagog that starts and finishes at Ayer's Cliff in Quebec, Canada. The event is part of the Swim The Kingdom event organized by Phil White of the Northeast Kingdom Open Water Swimming Association (NEKOWSA) and is one of Canada's Top Open Water Swims.