Wild Field (Russian: Дикое поле Dikoe pole) is a 300 ha (740 ac) nature reserve near the city of Tula in Tula Oblast in the European part of Russia, approximately 250 km (150 mi) south of Moscow. It was established in 2012 by Russian scientists Sergey Zimov and Nikita Zimov as a companion to Pleistocene Park in Siberia.