Saryarka – Steppe and Lakes of Northern Kazakhstan (Kazakh: Сарыарқа - Солтүстік Қазақстан даласы мен көлдері, romanized: Sarıarqa - Soltüstik Qazaqstan dalası men kölderi) is a part of the Kazakh Uplands (known in Kazakh as saryarka, or "yellow range") which has been designated a World Heritage Site by UNESCO.

[2] (see List of World Heritage Sites in Kazakhstan) The site comprises the Naurzum State Nature Reserve (located in Kostanay Province) and Korgalzhyn State Nature Reserve (located in Aqmola Region).

The two reserves contain wetlands which serve as important stop-over points for migrating birds from Africa, Europe, and South Asia.

It is estimated that 15–16 million birds, including many endangered species, use the site as a feeding ground.

[4] The site is also home to wildlife commonly found on the Kazakh steppe, including marmots, wolves, and the endangered saiga.