Dickson Lake is a glacier lake in southern Patagonia located in the Southern Patagonian Ice Field, which since 1998 has been transformed into an international lake as it is crossed by the international boundary between Argentina and Chile due to the retreat of the Dickson glacier. Until that year, Dickson Lake was entirely within Chilean territory, at the northern end of the Torres del Paine National Park in the Magallanes y la Antártica Chilena Region, but it was unified with a lake that began to form in the 1980s by defrosting the melting of the Dickson, Cubo (or Cincuentenario) and Frías (or Grande) glaciers. That lake was on the Argentine side when the Agreement was signed to specify the route of the limit from Mount Fitz Roy to the Daudet Hill of 1998, in a sector adjacent to the Los