Today, I thought about a friend of mine who is cycling the Styrkeprøven race, also called Den Store Styrkeprøven which means The Great Trial of Strength; this race is 540 km long, starting in Trondheim (Norway), and finishing in Oslo. What special? This distance should be accomplished in one time! He expects to do it in 18 hours. Particularly impressive when thinking about how fast the climatic conditions can change.

Then I also thought to all the runners of the Midnight Sun Marathon, a race in the Arctic city of Tromsø at 70°N. Probably one of the greatest marathon.