Tourism and sport are two phenomena that rapidly expanded at the end of the nineteenth century. The latter is often viewed as a service in a system structured by the former, in the way tennis courts or golf courses are established near hotel facilities. Yet, the development of outdoor sports reveals that a tourist territory can be defined by its sports function. Through the example of mountaineering in the French Pelvoux massif, we are going to show that a physical activity may have a major role in determining tourist territories and the local economic growth. This research paper investigates, chronologically and geographically, the expansion of mountaineering in the Pelvoux massif and its spin-off effects on touristic amenities, especially in the development of hotel services, town-and-country planning and communications. This demonstration is based on archives from several alpine societies - the French Alpine Club, the Society of Dauphine ́ Tourists and the Touring Club de France - as well as on monographs published by mountaineers.