Karst River Quarry is a multiplayer map featured in Call of Duty: Modern Warfare. The map is designed for the Ground War mode and allows for 32 vs 32 battles. 


It is set in an industrial area in Kastovia, with factories and a quarry all in the playable area. The mountains along the side allow for snipers to set up position in.

The two buildings along the train tracks, containing the B and C flags are the most populated and tight areas, making it a good idea to use a close-engagement gun or set up Claymores. The roofs are also accessible.


  • When playing as Allegiance, the map is known as "Operation Fire Pit". When playing as Coalition, the map is known as "Operation Black Box".
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