[1] The river takes its source at an altitude of 561 m on the southern foothills of the Stidovska planina section of the Balkan Mountains, in the vicinity of the Novo Selo Range.

Along its entire length, it flows through flat terrain in a wide valley with a large flood terrace and a small longitudinal slope of 1.4 %.

In its upper course, it crosses from west to east the Sungurlare field of the Karnobat Valley, while gradually turning southwards.

Downstream of the gorge, the Mochuritsa enters the Sliven Valley, where its longitudinal slope becomes even smaller and marshy areas and high groundwater appear in its valley, which gives the name of the river from the Bulgarian word for marsh, мочурище (translit.

[1] The average annual flow is at the village of Vodenichane is 2.7 m3/s due to the intensive use of the water for irrigation.