Tatarskiy Val, Defensive wall in Tambov Oblast, Russia.

Tatarskiy Val is a defensive earthwork in Tambov Oblast, Russia, near the village of Kuzmino-Gat. It survives as a long, raised embankment covered in dry grass, with a steep front face and a narrow crest; only 12–15 km of the original 72 km Tambov section remain.

The structure was built in 1647 to protect settlements and mark territorial boundaries during Russian expansion. It was part of a larger defensive network against raids from nomadic groups.

The name comes from the Tatar raids the rampart was built to stop. Villagers from nearby districts heaped it by hand, and in 1655 attackers had to dig a breach near Tambov, losing time and men. Because the surviving stretches were never ploughed, relict steppe grasses and flowers of the wild field grow on them.

The surviving section near Kuzmino-Gat is a steep-sided earthen ridge, not level ground; the front slope is densely overgrown with dry grass and stems, so approach along the crest rather than climbing the face. The top is narrow, about two metres wide, and a person standing there is visible against the sky. Ground can be uneven and slippery in wet weather.

Because the earth of the surviving stretches was never ploughed, and turf was laid so that roots bound each layer to the last, rare endemic plants of the wild steppe survived on the rampart. The section by the Polynkovskoye cemetery is the best known in Tambov, though visitors there have dug away turf and soil for grave upkeep.