Umhlanga lagoon is a 26 hectares (64 acres) nature reserve on the shore of the Indian Ocean at Umhlanga Rocks, South Africa. The reserve encloses the Ohlanga River's lagoon and mouth. The forest forms a natural extension of the less accessible Hawaan Forest, of which the greater part lies inland of the busy M4 road. The reserve trails start at a car park at the northern end of Lagoon Drive, Umhlanga. The reserve has picnic sites, the remains of a prehistoric shell midden and walking trails, with a walkway and pedestrian bridge that span the lagoon.