Styrkeprøven
![](../I/m/Styrkeproeven_2007_Gudbrandsdalen.jpg)
Participants in 2007, somewhere in Gudbrandsdalen.
Participants in 2008, at Hundorp.
![](../I/m/TrondheimOsloAfter540km.jpg)
Cyclist after 540 km
![](../I/m/TrondheimOsloDiplom1996.jpg)
Diploma
Styrkeprøven, also called Den Store Styrkeprøven (The Great Trial of Strength), is a 540 km (340 mi) 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.[1]
Another race on part of the route of Styrkeprøven
Den Lille Styrkeprøven (The Little Trial of Strength, word-play on Lillehammer), which is 180 km (110 mi), from Lillehammer to Oslo, is also held at same time.