In summer, the best way to arrive is by lake ferry from Lieksa.
On weekends during the ski season, buses run to Koli kylä (village) from Joensuu (€10, 1½ hours, one daily Saturday and Sunday from early December to Easter).
If you’re coming by car follow Rd 6 and turn off at Rd 504.
Koli Hill has road access with a short funicular ride from the lower car park up to the Break Sokos Hotel Koli.
In winter, when the ice is thick enough, a 7km-long ice road crosses the lake from Vuonislahti to Loma-Koli, 8.5km east of Koli village, providing a shortcut of 60km.