Related Clues:

• __ Mountains (Eurasian range)
• River separating continents
• Russia river
• Orenburg is on it
• Eurasian boundary river
• River with a sturgeon population
• The Ilek is one of its tributaries
• ___ Mountains (they divide Europe and Asia)
• Range mostly in Russia
• ___ Mountains (Asia/Europe separator)
• Range extending to the Arctic Ocean
• Asian border range
• Territory east of Ukraine on a Risk board
• Europe-Asia border river
• Mountains through Russia