Invasive alien species represent a significant global threat to ecosystems, economies, food security, and human health. They are responsible for 60% of global plant and animal extinctions. In 2019, the global economic cost of invasive species exceeded USD 423 billion annually, with costs increasing at least fourfold every decade since 1970. High-elevation ecosystems, however, remain among the few areas not yet heavily impacted by these species. This is expected to change as invasive species expand their range upwards to occupy new climatic niches in response to ongoing human-induced disturbances. The construction of infrastructure, such as roads and railways, is accelerating this process, particularly in the Kashmir Himalaya. Particularly, the roads act as effective corridors, facilitating the spread of invasive species along elevation gradients in mountain areas. In my presentation, I will discuss what we know about plant invasions in mountainous landscapes in general, with a particular focus on the Kashmir Himalaya.