The Retizhe (Bulgarian: Ретиже) is a river in south-western Bulgaria, a right tributary of the Mesta.

[1][2] The river is 19 km long and drains parts of the eastern slopes of the Pirin mountain range.

It then flows in north-eastern direction in a deep valley, forming rapids and small waterfalls.

Some four kilometres before its mouth the Retizhe turns in eastern direction and forms a deep impassable canyon.

[1] The main tributary is the Kremeshnitsa, which flows into the Retizhe close to its confluence with the Mesta.