The Kama is a 1,805-kilometre long river in Russia. It has a drainage basin of 507,000 square kilometres. It is the longest left tributary of the Volga and the largest one in discharge. At their confluence, in fact, the Kama is even larger than the Volga.
It starts in the Udmurt Republic, near Kuliga, flowing northwest for 200 kilometres, turning northeast near Loyno for another 200 kilometres, then turning south and west in Perm Krai, flowing again through the Udmurt Republic and then through the Republic of Tatarstan, where it meets the Volga.
Wikipedia https://en.wikipedia.org/wiki/Kama_(river)
Coordinates 55°36'20.102" N 51°41'57.272" E