Lysaker sprint re-run (2021-01-05)

Reran this course from April last year. At night and with -8C it was quite cold, particularly close to the river where the supercooled river mist from the big waterfall near #6 was also making it very slippery.
Hand-drawn route since I had sent in my primary GPS watch for a fixup and my backup watch failed.
One serious mistake to #14 where it was faster to go around the second-to-last building on the right, saving both some stairs and a couple of meters of ascent.