Pugachov's Oak, Protected oak tree in Mari El, Russia.

Pugachov's Oak is a 26-metre-tall oak in the Klenovaya Gora tract of Mariy Chodra National Park, about 1 km northwest of Konanyer Lake. Its trunk measures 1.59 m in diameter. In April 2013 it was designated a living nature monument.

The oak's name recalls Yemelyan Pugachev, whose rebels retreated into the Mari forests after their defeat at Kazan in 1774; legend says he watched the burning city from its crown. Researchers doubt this, since the tree was then unremarkable in size. A larger oak nearby, dated to about 1400, died in the 1940s and was cut down in the 1950s; it may be the original Pugachev's Oak.

The tree's name comes from a legend that Yemelyan Pugachev climbed its crown to watch Kazan burn after his defeat in 1774. Researchers doubt this oak was large enough then, and suggest the story may refer to an older oak nearby that died in the 1940s and was cut down in the 1950s. The tree is also called Pugachev tumo in Meadow Mari.

Access the oak via marked trails in Mariy Chodra National Park with parking at the main entrance. Wear comfortable shoes and weather-appropriate clothing since the walk takes you through the forest.

Researchers disagree on the oak's age: estimates range from about 1500 to 1650, and a 2013 study dated its first growth to 1600. The legend may in fact belong to another large oak that grew nearby from around the 1400s, died in the 1940s and was cut down in the 1950s.