Allison Harbour Marine Park is located mid-way along the southern shore of Allison Harbour, with three pocket beaches and two creeks running through the park.
The park protects important habitat for resident gray whales during the summer and second growth forest on the upland. Allison Harbour is a protected, short inlet comprised of small coves with tidal flats at the head. This is a protected transitional stop for boaters and is used as a safe anchorage from frequent southeasterly winds.
The harbour is the last all-weather anchorage for boaters travelling north around Cape Caution. It is an important addition to the network of boat havens along the British Columbia coast.