Some might be interested in this. The inaugural one is just starting. https://www.randonneurs.fi/ruska-ride-across-finland-info-page/ (Some dry humour in this page!) It's 1800km in 8 days 6 hours. As much as I love Finland, from experience of driving there I imagine this may be mentally really tough, as most of the time you will be riding along roads with forest each side. All day. Now and then a lake, then more forest. Maybe the odd reindeer. Then more forest. Not many hills. Lots of forest.