Kraishte (Bulgarian: Краище, sometimes with a definite article Краището, Kraishteto) or Krajište (Serbian: Крајиште) is a geographical and historical region split between southwestern Bulgaria and southeastern Serbia, with a very small part in northeastern North Macedonia.
Geographically, Kraishte is a mosaic of highlands and mountains of low to medium height, interspersed with high valleys.
To the east and south are the Dupnitsa and Kyustendil basins respectively, in which the Dzherman and Struma rivers separate it from the higher mountains of Rila and Osogovo.
Major towns in Kraishte include Tran and Zemen in Bulgaria and Bosilegrad in Serbia.
[4] The town of Tran in Kraishte holds the record for the lowest temperature ever measured in Bulgaria, at –38.3 °C.