It is named after the Isère River and has approximately 1.27 million inhabitants (most recent figures around 2019-2025).
Capital/prefecture: Grenoble (known as the "capital of the Alps").
Features: Highly varied landscape—from high Alpine mountains (such as parts of Écrins, Belledonne, Chartreuse, and Vercors) to valleys and flatter terrain towards the Rhône.
Known for: Winter sports (the third largest ski area in France, including Les Deux Alpes and Alpe d'Huez).
Hiking, cycling, and nature in the summer.
Technology and research (Grenoble is a major innovation region).
Historic sites such as Vienne (Roman remains).
In short: a spectacular mountainous department with a mix of nature, sports, science, and culture, ideal for outdoor enthusiasts all year round.


































