Loudenvielle (French pronunciation: [ludɑ̃vjɛl]; Occitan: Lodenvièla) is a commune in the Hautes-Pyrénées department in south-western France. On 1 January 2016, the former commune Armenteule was merged into Loudenvielle.Its inhabitants are called Loudenviellois.Located in the Louron Valley, Loudenvielle is a popular tourist resort, with a lake, campsite, thermal spa and waterpark.