Greenstone Saddle Campsite is a walk-in, tent-only campsite situated on the trail linking the Routeburn Track with the Greenstone and Caples tracks, within the Greenstone and Caples Conservation Areas and Fiordland National Park.

Formerly known as Howden Campsite, it sits near the Lake Howden outlet and serves as the nearest camping area with a toilet along this connecting route.

The site is accessible only on foot — approximately a two-hour hike from the Divide and about half an hour from the Routeburn Track. Howden Hut, which once stood nearby, has been permanently removed following a landslide.

The campsite is managed by the Department of Conservation and is free to use.