Most of the shoreline is developed with cottages and resorts, but these are largely hidden from view by deciduous and conifer trees that grow to the water’s edge.

Granite bedrock surrounding the lake is typically covered by a thin layer of topsoil, with a few rock out-crops and sand beaches across the shore as well.

With the completion of the roads linking the area to southern Ontario, Kashagawigamog became home to the oldest cottaging history in the county and the highest development.

The most common types of nearshore habitat observed on Kashagawigamog Lake were terrestrial logs, followed overhanging vegetation.

In the same survey it was found that there were invasive species present in the lake's ecosystem such as Eurasian milfoil and Purple loosestrife.