Willapa Bay AiR is situated near Oysterville, Washington, a historic village approximately 30 miles north of the mouth of the Columbia River.

Oysterville is the most northern settlement on the Long Beach Peninsula, a finger of land embraced by three mighty bodies of water: to the west, the Pacific Ocean; to the south, the great Columbia River; and to the east, Willapa Bay, considered one of the most pristine estuaries in North America.

The Long Beach Peninsula, twenty miles long and two miles wide, was formed by a confluence of the Columbia River and the Pacific Ocean.

Two spines of sand ridges running up the east and west sides of the Peninsula form interdunal wetlands that support trumpeter swans, black bears, coyotes, porcupine - and crimson cranberry bogs edged by grassy dike roads.