Biogradska Gora — "Biograd's Forest" — is the centrepiece of the western Bjelasica massif and one of the few stretches of virgin primeval forest left in Europe. The park covers 54 square kilometres of forest, lakes and peaks, with the small glacial Lake Biogradsko at its heart. The trees are old and tall — some beeches and firs over 500 years old and over 40 metres high — and the floor is a tangle of moss, fallen trunks, and wildflowers.
The standard visit is a 3.5 km loop trail around the lake — flat, well-signposted, takes about 90 minutes at a relaxed pace. Longer trails head up into the surrounding peaks. The visitor centre at the lake has a small museum, a restaurant serving local trout, and rents canoes and rowboats by the hour. Entrance fee is around €5. Open year-round but at its best in late spring and early autumn.