The aim of this article is to analyse the profitability of ski resorts in Spain and identify its associated determining factors in order to verify whether these are economically sustainable taking into account the internal and external aspects affecting them. To this end, the article first addresses the importance of snow tourism in Spain, before going on to analyse the influence that climate change is having on this type of tourism. A series of economic and structural ratios are then applied to the financial statements of ski resorts in Spain with the aim of establishing a base diagnosis for their situation. Finally, a regression model is estimated, the results of which reveal the more profitable ski resorts at the economic level to be those with the largest stations, a direct relationship being observed between profitability and size. The results also confirm the negative consequences of high indebtedness and the non-significant effects of using snowmaking systems.