| Bolshaya Martayka | |
| Mouth Location: | Vels |
| Length: | 18km (11miles) |
The Bolshaya Martayka (Russian: Большая Мартайка) is a river in Perm Krai, Russia, a left tributary of Vels which in turn is a tributary of Vishera. The river is 18km (11miles) long.[1] Its source is near the border with Sverdlovsk Oblast, and it flows through the Vishersky Nature Reserve.