ÉchenevexÉchenevex is a commune in the Ain department in eastern France., it is the commune with the fifth highest median per capita income in France.WWW echenevex.frGeographyÉchenevex is located between the Jura mountains and the Lake Geneva region. It is situated on the slopes of the Jura mountains, just 3 km south of Gex. The Large Hadron Collider passes under Échenevex, about 100 m below the surface. Echenevex consists partly of the Jura mountains natural park area and is approximately 8 minutes from the Crozet Telecabine ski station, and 15 minutes from Geneva International Airport.