De Oerhaal is a small, cosy marina situated on the Rjochte Grou, a through-waterway connecting to the Pikmeer, in the heart of Friesland near the watersports village of Grou.

The harbour offers around 25 berths ranging from 7 to 15 metres, available on a seasonal or annual basis, with electricity and water hookups at each berth along with shared toilet facilities.

From the marina, boaters have direct access to the Pikmeer and the broader Friese Meren network, with routes extending as far as Leeuwarden. The harbour also features luxury houseboats for holiday stays and views across the water toward the village of Grou.