Located at the northern tip of Quadra Island, Small Inlet Marine Park provides a well-protected anchorage where boaters can wait for slack water to pass through the tidal rapids of Discovery Passage, Okisollo Channel and Hole in the Wall.
The park encompasses Newton Lake, a small lake suitable for swimming and picnicking, although no facilities are provided. A rough trail from the southeast corner of Small Inlet leads to the lake. It is also possible to portage from the head of Small Inlet Marine Park to nearby Waiatt Bay in Octopus Islands Marine Park via a rough trail, approximately 1.5 km long.