Luda Mara (or Petrich River) originates from a spring at the foot of Mount Kongur, at altitudes above 1700 m.  At the beginning river flows through the steep northern slope of Mount  Kongur and on his way collect small left and right tributaries. This is the main river that runs through the town of Petrich. The name of the river brings the mighty waters, which result from melting snow and heavy rains Belasitsa mountain.

Map of the region