Knobs Flat sits in the Eglinton Valley roughly halfway between Te Anau and Milford Sound, alongside State Highway 94 in Fiordland National Park.

The site has historical roots as a workers' camp during construction of the Milford Road and Homer Tunnel, a role it held until the 1980s.

Today it hosts the Eglinton Valley Campground, the only fully serviced campsite on the Milford Road, welcoming both tents and campervans, though no powered sites are available. The campground offers hot showers, a kitchen, laundry, and recycling facilities.

Nearby walking tracks and information panels covering Eglinton Valley wildlife and avalanche hazards add further interest.

For travellers passing through without staying, Knobs Flat serves as a practical road-trip stop — it is the last place with flush toilets before Milford Sound and a reliable point to check current road conditions.