The Trigrad Gorge (Bulgarian: Триградско ждрело, pronounced [triˈɡratsko ʒdrɛˈɫɔ]) is a canyon of vertical marble rocks in the Rhodope Mountains.

The gorge encloses the course of the Trigradska River, which plunges into the Devil's Throat Cave and 530 metres (1,740 ft) further emerges as a large karst spring.

Initially, the two walls are about 300 m apart, but the gorge narrows to about 100 metres (330 ft) in the northern section.

Trigrad Gap on Livingston Island in the South Shetland Islands, Antarctica, is named after Trigrad settlement and gorge.

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