Starting from Tršće, take the scenic serpentine roads downhill to Smrečje and Mali Lug, where you can enjoy the view of the grandiose forests of Gorski Kotar. Make sure to stop by the towering statue of Petar Klepac, a legendary giant with supernatural powers and a symbol of the strength of the people of Gorski Kotar. Once in Mali Lug, turn left and take the road leading to Zamost.

At around the 10-kilometre mark, a branch of the road will take you to the village of Kupari – the point of origin of the Kupa river source. Visit the Birth House of the River Kupa Interpretation Centre, which educates its guests on the rich biodiversity of the Kupa river. Once in Kupari, make your way across the Kupa river, and keep cycling along its right bank to the village of Hrvatsko, then upstream along the Čabranka river. In Zamost, you can take a break by the old mill and sawmill, preserved in their original state, and in Čabar, you can visit the 17th-century Zrinski Castle. Fuel your body with cheese and herbal juices at the Pintar family farm, which will give you enough strength to make it through the final 10 kilometres.