On our way from Obihiro City through Akan National Park to Kitami City, we could see the mountains with white crown from the Route 241. It was still cold and seemed to snow on top of the mountains.
Approximately 30 minute walk brings you to the hot spring water fall in the forest near the lake. Somebody released tropical fish in the pool under the hot spring water fall and they increased the number until five years ago.
I am not sure if those fish are still swimming in the pool or not.