Karkali Nature Park is a deciduous forest area located in Karjalohja, Lohja. The marked trail consists of loops of varying lengths, allowing visitors to choose a walk ranging from about half a kilometer to six kilometers. The area features hazel groves and linden forests, and in the fall, the colors of autumn foliage. Visitors are permitted only on the marked trail: camping, making fires, and gathering wild plants are not allowed in the nature park. Pets must be kept on a leash. The hike begins at the parking lot at the end of Karkalintie; the area is managed by Metsähallitus Nature Services.