The complex interactions between snow cover and forests have implications for mountain ecosystems and water resources. However, the geographic distribution of where snow and forest overlap in mountains remains poorly known. Here, we evaluate the importance of snowfall over forested environments and its spatial variability at the global scale and a high spatial resolution (0.1°), leveraging an existing climatological reanalysis and a satellite tree cover map. We find that most mountain ranges experience snowfall in forested areas, mostly in the northern hemisphere (7.7 10⁶ km²) and the southern Andes (0.3 10⁶ km²). The solid fraction of precipitation is generally greater in mountain forests of a basin than in the rest of it. This fraction reaches 64% locally, and 34% when aggregated over mountain ranges.