There are approximately 80 kilometres of marked routes to choose from depending on your physical fitness and the time available, and these can be explored with or without a guide.

• The area's famous views are best admired from a vantage point on top of the park's highest hill, Ukko-Koli. There is also a demanding accessible route (0.8 km) to the viewing platform from Koli Nature Centre Ukko.
• Kasken Kierros Nature Trail (4.1 km) is ideal for school children and families. The trail passes through slash-and-burn landscape typical of the area.
• Herajärven kierros Trail (30–61 km) is a challenging route across wooded hills, perfect for seasoned hikers looking for breathtaking views and the sound of bubbling brooks and birdsong. You can bring your own tent or spend the night in a lean-to shelter or a cabin. There is also a hotel for more luxurious overnight stays.