What is "styrkeproeven"

Styrkeprøven, also called Den Store Styrkeprøven (The Great Trial of Strength), is a long bicycle cyclosportive which starts in Trondheim and finishes in Oslo, Norway. It was first held in 1967, initiaded by Erik Gjems-Onstad and has taken place since then in late June every year.

In 2012 the record time was 12.51,02.