Riverside Island Marina sits on the River Lark near Isleham, occupying a well-positioned site with good accessibility for both boats and vehicles, set within landscaped parklands.

The marina is a private, gated facility, making it a secure base for those arriving by water or road.

The River Lark itself is a tributary of the River Great Ouse, with a long history of navigation stretching back to Roman times, offering pleasant cruising through the Cambridgeshire and Suffolk fenlands.