The terrain consists of both rocky and sandy beaches, dense mountain forests, and higher up, glaciers and icefields.
Because of the rugged conditions and unpredictable coastal weather, visitors are advised to be prepared for sudden wind, rain, or snowstorms at any time of year, especially at higher elevations, and to file a travel plan with rangers.
The Kachemak Bay area was infested with spruce bark beetles during the late 1990s, and thousands of acres have dead trees still standing within the park.
At least one wildfire, the Mile 17 fire, burned areas of dead standing spruce on park land.
U.S. Geological Survey Geographic Names Information System: Kachemak Bay State Park