From EXPLORE.org
Main Beach is a long, concave beach extending from the northern tip of Round Island and the primary walrus “haul-out” location; the greatest numbers of walruses should be visible along this beach. Look up along the cliffs for nesting seabirds, and out to sea for other marine mammals such as whales, sea lions and seals.
The Walrus Islands State Game Sanctuary (WISGS) was established in 1960 to protect one of the largest terrestrial haulout sites in North America for Pacific walrus (Odobenus rosmarus divergens). The sanctuary also protects important habitats for several species of seabirds, Steller sea lions (Eumetopias jubatus) and other marine and terrestrial birds and mammals. The Alaska Department of Fish and Game (ADF&G) manages the sanctuary primarily to protect these important habitats and wildlife species.
Best known among the WISGS islands is Round Island, where each summer large numbers of male walruses haul out on exposed, rocky beaches. Round Island is one of four major terrestrial haulouts in Alaska. Male walrus return to these haulouts every spring as the ice pack recedes northward, remaining in Bristol Bay to feed they haul out at these beach sites for several days between each feeding foray. The number of walrus using the island fluctuates significantly from year to year. However, up to 14,000 walrus have been counted on Round Island in a single day.
Source : http://www.EXPLORE.org