The Okhta is a river in Vsevolozhsky District of Leningrad Oblast and the eastern part of the city of Saint Petersburg, Russia. It is the largest right tributary of the river Neva. It joins the Neva 12 kilometres (7.5 mi) upstream of the Neva's mouth, within the city limits of Saint Petersburg. The length of the Okhta is 90 kilometres (56 mi), and the area of its drainage basin is 768 square kilometres (297 sq mi). Its largest tributary is the Okkervil (left). The Rzhevsky Reservoir has been built on the Okhta. The Utkina Dacha estate is located on the banks of the Okhta close to the mouth of the Okkervil.