Ring 4 is one of Oslo's best-kept cycling secrets — a classic loop through Nordmarka that has been a local favourite for decades. The name refers to the fourth ring of trails radiating out from the city, and it's the one that strikes the perfect balance between wild forest riding and manageable distance.
We take the T-bane to Sognsvann and start at the lake's edge, where the forest begins immediately. The route heads north through stands of pine and silver birch, following gravel forest roads that are smooth enough to roll at speed but varied enough to keep things interesting. Expect a couple of proper climbs — both well rewarded with long, flowing descents.
Halfway around you'll pass Kikutstua, a traditional Norwegian mountain cabin that serves waffles and coffee. We stop here for a well-earned break before looping back south through the Maridalen valley, one of the few agricultural landscapes left within Oslo's city limits, and finishing back at the lake.
