 The pass is 20 km long with a maximum altitude of 1140 m. It connects of the valley of the river Struma in the west with the Razlog Valley in the east.It begins to the north-east from the village of Gradevo at 531 m altitude and runs in eastern and south-eastern direction upstream of the Elovitsa valley of the Struma basin.It reaches its highest point in 12.9 km and then descends along the valley of the river Iztok of the Mesta drainage.