Ring 2, sometimes called Kirkeveiringen and until 2010 officially known as National Road 161 (Norwegian: Riksvei 161), and now also officially County road 161 (Norwegian: Fylkesvei 161), is the oldest ring road and surface street through densely populated parts of Oslo, Norway.
The most important locations along the route are Skøyen, Frogner, Majorstuen, Lindern, Sagene, Carl Berners plass, Tøyen and Galgeberg.
Major parts of Ring 2 are heavily congested during peak hours, because of low capacity and many large intersections.
The entire route is a priority road and the speed limit is 50 km/h.
The gas stations along the road are situated on Skøyen, Marienlyst, Fagerborg, Lindern, Carl Berners Plass and Tøyen.