From Vana-Vastseliina, the trail runs through the Piusa primeval valley landscape reserve in quite a length. Here the look of the forests begins to change. The Vastseliina Manor Park, rich in species, also includes hardwoods such as ash, oak and maple. Moving further, at first, on the steep banks of the primeval valley, there are still western taiga and, at the bottom of the primeval valley, fragments of floodplain forest. The main tree species of the landscape reserve area is pine, which is very evident in the northern part of the reserve. There is a large mass of dry pine forests there. Around Lindsi and Obinitsa the trail passes through a territory of large fields, but a few kilometres after Obinitsa, the trail once again reaches into dry pine forests filled with light. As the Devonian sandstone is exposed here and there around Piusa, small patches of heath pine forests grow in the driest areas.