This is from Ulsrudvann. A lake in Østmarka, Oslo municipality, between Ulsrud and Nøklevann.
With trails crisscrossing Østmarka is perfect for mountainbikers.
If you’re around here in the sommertime – try to add in a short breake by this lake to cool down. It´s popular to swim here and the water temp is often the highest throughout all of Norway.