Routeburn Flats Campsite sits in the open, grassed river valley of the Routeburn Track, one of New Zealand's Great Walks, within Mt Aspiring National Park.

It is located near Routeburn Flats Hut, roughly a five-minute walk from the hut, and Emily Creek lies approximately halfway between this point and the next destination, Routeburn Falls Hut.

The campsite accommodates up to 30 campers and is managed by the Department of Conservation. Basic facilities include toilets, sinks, a water supply, picnic tables, and a cooking shelter.

Note that campers are not permitted to use the adjacent hut's facilities. Bookings are required during the Great Walks season (1 November–30 April), and no camping is permitted beyond this point toward Lake Mackenzie.