Denis Ducroz, born in 1949, is a Chamonix-based mountain guide, filmmaker, director, and writer.

He has established himself as one of the most active filmmakers in the field of high mountain and expeditions, both as a cameraman and director, collaborating on numerous films dedicated to the mountain world. His audiovisual output has expanded over time to include social, economic, environmental, and cultural themes, while remaining focused on the world's mountains and their populations. Among the most notable is "Les inconnus du Mont-Blanc" (1986), a film that recreates the first ascent of Mont Blanc by Jacques Balmat and Michel Paccard, immersing the viewer in the minds of the mountaineering pioneers. He also directed "Le Refuge des Cosmiques" (1991), a documentary produced as part of the "Montagne" collection for France 3 Grenoble, which traces the history and reconstruction of the Cosmiques refuge at the Col du Midi, on the Mont Blanc massif. He says: "Television allowed me to travel extensively and to decipher something other than the Vallot guide. I read, from the authoritative pens of a mountaineer and a sociologist, that mountain cinema didn't exist because filmmakers knew nothing about the mountains and mountaineers were barely capable of skewering their exploits. Double praise."

In his sixties, Denis Ducroz turned to writing novels, publishing in 2016 N’approchez Pas De L’Île Dawson, a story inspired by an expedition to Patagonia, which earned him the 2017 Henri Queffélec Prize awarded by the Livre & Mer festival in Concarneau. He continued his literary work with Le Pont De Neige (2018) and a biography of the famous mountaineer Valery Babanov (2023). His career demonstrates a deep passion for the mountains, which he explores through adventure, images, and writing.