runway: 03/21 - 330m/1083ft - gravel
runway: 10/28 - 467m/1532ft - gravel
runway: 18/36 - 376m/1234 - grass
North Ronaldsay air field (ICAO: EGEN) is an airfield on North Ronaldsay island in the Orkneys in Scotland.
The airfield was built in 1934. There are scheduled services, such as flown to the other remote airfields, using Britten-Norman Islanders. The airfields' only facilities are a platform and a small office building/shed.
A Loganair Islander at North Ronaldsay in 2006 (Wikipedia).
North Ronaldsay on a 2010 CAA map (Eurocontrol).