From Lahti you can get to Asikkala and Padasjoki along route 24. You can get to Sysmä either via Asikkala: routes 24 and 314 or via Heinola along routes 4/E75 and 410.
Helsinki - Asikkala approx. 130 km
Helsinki- Padasjoki approx. 160 km
Helsinki- Sysmä approx. 175 km
Lahti-Asikkala approx. 25 km
Lahti -Padasjoki approx. 53 km
Lahti-Sysmä approx. 70 km