ST521 Polkovnik Serafimovo - Srednogorci

Stage in the Sultans Trail, a historic and cultural long-distance hiking route from Vienna to Istanbul.

At 17.7 km, this is a solid full-day hike. At an average walking pace you can expect to complete the route in roughly 3 hours and 56 minutes.

As a linear trail, this route has distinct start and end points. Return transport is worth arranging in advance unless you plan to walk back the same way. The trail is officially waymarked as ST521, so look out for the trail markers along the way.

Part of the International Walking Network (IWN), this route connects to a continent-spanning long-distance trail system. It meets the highest standards of waymarking, surface quality, and route documentation.