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Route To O-Season 2020: Day 57

In today’s leg in Route to O-Season 2020 we have another very long leg. We still have 10Mila focus, but instead of the real 10Mila we visit one of several local “10Mila at home” competitions – in this case Nydalen’s “Corona-natten” competition in Oslo.

The chosen leg is the long 18th leg. Thanks a lot to Terje Mathisen for the tip and some analysis of the leg!

The leg is as usually first provided without routes – you may take a look at it and think about how you would attack this leg (if the image is too small, you may click on it to get it larger). Note that there was a map exchange just before the leg.


You find other maps from the area in omaps.worldofo.com here. See also latest additions in 3DRerun from this area in order to learn more about this terrain type.



Next you can draw your own route using the ‘Webroute’ below. Think through how you would attack this leg, and draw the route you would have made. Some comments about why you would choose a certain route are always nice for the other readers.

Then you can take a look at how the runners have solved this leg below. Please note that a part of the road around to the left was not on the competitors map, but most competitors knew the area well enough to be aware of how the road goes in this area (however some might have chosen to keep within the map extent).

Some comments from Terje Mathisen (editors translation):

  • Anders N(ordberg) (fastest) run exactly the route which was expected to be fastest ahead of the race.
  • Jon (Aukrust Osmoen) running left (but not all the way around on the road out of the map) actually run longer than Anders N – and lost a minutes due to not being on the faster road.
  • The spectators were surprised when Bojan and Sverre met on their routes (close to the power line, editors comment) and “exchanged routes”
  • Those who didn’t believe in the road around to the left thought that Bojan start (right) + Sverre last part (right on the road) would be fastest (editors comment: The GPS-data doesn’t really indicate that, but with N=1+1 it is not very trustworthy)

Density map

See below for a density map of some of the ones who have drawn their routes so far (available during the day when some readers have drawn their route).

Additional information

You find the complete map in omaps.worldofo.com at this location.

Route to O-Season 2020 series

Route Choice Challenges while waiting for the real action: With the upcoming orienteering season indefinitely on hold in large parts of the the world due to COVID-19, regular orienteering route choice challenges may be one way to make sure those orienteering skills don’t get completely rusty. I’ll try to keep these coming daily, but need help from all of you out there to keep them coming and to keep up a certain quality.

Tips on good route choice challenges – either from races/trainings (even cancelled ones) or theoretical ones with accompanying analysis – are very welcome (please e-mail to jan@kocbach.net).

Not all legs are taken for the interesting routechoice alternatives – some are also taken because the map is interesting – or because it is not straightforward to see what to do on a certain leg. Any comments are welcome – especially if you ran the event chosen for todays leg!

About Jan Kocbach

Jan Kocbach is the founder of WorldofO.com - taking care of everything from site development to writing articles, photography and analysis.

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  1. Terje Wiig Mathisen

    Sorry I didn’t write my comments to you in English! :-(

    Personally I was sure the road would be fastest but among the people following the live tracking several wanted to start like Bojan, but then keep on the minor paths which leads almost directly down to the south end of Lille Åklungen. I am quite sure this would have been faster than how he did run, but still significantly slower than going left.
    It is quite interesting that due to the complicated terrain between the two lakes, Jon’s “shortcut” was in fact longer than Anders’ route.

    • @Terje: Thanks both for your contribution with the leg and the comment here – no problem to get it in Norwegian, but you have to live with my translation then :)

    • Torstein Hole

      Should perhaps be mentioned that the runners maps were cut so all green route-choices to the left were outside the map… But since most runners were very local – they knew well the road around Skjennungen and through Ullevålseter.