This dataset contains the openly accessible data for the FIMP survey carried out on Kootenay Lake in 2021. The key objective of this study was to update the original FIMP that was conducted in 2012 on Kootenay Lake (Schleppe and Cormano 2016), and to document changes that have occurred over the nine-year period since the last survey. The desire to live and recreate in the Kootenay Region of British Columbia (BC), combined with the generally positive economic climate, has resulted in rapid population growth and urban development. Lake foreshore (or shoreline) residential development pressures (both permanent and seasonal) have especially increased. Kootenay Lake, with its approximate 400 km of shoreline, has seen a pronounced amount of this growth. This development inevitably impacts the natural foreshore environment. Unfortunately, these impacts can diminish the natural values that draw people to live and recreate along the foreshore in the first place.