Cowshed Bay Campsite sits on the edge of Kenepuru Sound at Portage Bay in the Marlborough Sounds, South Island, managed by the Department of Conservation.

The site accommodates around 40 camping areas and is split by a road, with the bush-clad inland side available for tents. Facilities include flush toilets, cold showers, two kitchen shelter structures, and water at the sinks.

A camp host is present for much of the year. Fires are not permitted at any time. The campsite is well placed for exploring the region by water or on foot, with the Queen Charlotte Track accessible directly from the back of the ground.

The nearby Portage settlement, roughly 500 metres away, offers a bar, restaurant, and jetty. The approach follows a winding, scenic drive along Kenepuru Road through the Marlborough Sounds.