"Rurik" served as the flagship of the Russian Baltic Fleet for much of her relatively short career. She made one overseas cruise with a trip to the Mediterranean Sea in mid-1910, but spent the rest of her early career in the Baltic Sea. After the start of World War I, she operated with the other cruisers of the fleet, making raids on German positions in the southern Baltic, and after being modified to carry naval mines, took part in laying offensive minefields to block German naval traffic. She saw one major action, the Battle of Åland Islands, in July 1915. There, she engaged three German cruisers; she failed to score any hits and was struck several times, though she was not seriously damaged and her presence convinced the Germans to retreat.