Lac de Conche is a lake in the canton of Valais, Switzerland. It is located in the municipality of Collombey-Muraz, at an elevation of 1687 m, close to the French border.

At the 15th World Conference of WAGGGS it was decided to mark the centenary of the birth of Lady Baden-Powell, the founder of Guiding, by holding a World Camp with four locations — Doe Lake, Ontario, Canada; Quezon City, Philippines; Lac de Conche; and Windsor Great Park, England, from January 19 to February 2, 1957.