Constitution 1857 National Park, National park in Ensenada, Mexico

Constitution 1857 National Park is a protected area in the Sierra de Juarez that features pine forests, rocky outcrops, and the natural freshwater Laguna Hansen lake system. The terrain offers varied landscapes with mountainous areas and forest patches that together create a diverse natural habitat.

The area was declared a national park by the Mexican government in 1962 to protect forest resources and create recreational space. This establishment was part of Mexico's early efforts to safeguard important natural landscapes.

The park's name honours the Constitution of 1857, and its alternative name, Laguna Hanson, comes from the lake at the centre of the Hanson Plain. Visitors camp, hike and climb here, and when the season allows they canoe, row and fish on the lagoons. The lakes freeze in winter and nearly dry out in summer.

The park sits about 96 kilometers east of Ensenada along Highway 3 and is accessible by car. Overnight options like camping areas and cabins are available on-site for extended visits.

The park's lakes sit on the Hanson Plain, a granite-and-sand basin thought to have formed during the Mesozoic Era. Laguna Hanson lies at 1,580 metres, and shallow lakes that appear in the wet season freeze over on winter nights and then dry out almost completely in summer.