Oregon Dunes National Recreation Area

The Oregon Dunes National Recreation Area is located on the Oregon Coast, stretching approximately 40 miles north of the Coos River in North Bend to the Siuslaw River in Florence, and adjoining Honeyman State Park on the west. It is part of Siuslaw National Forest and is administered by the United States Forest Service.

The Oregon Dunes are a unique area of windswept sand. They are the largest expanse of coastal sand dunes in North America and one of the largest expanses of temperate coastal sand dunes in the world, with some dunes reaching 500 feet above sea level. They are the product of millions of years of erosion by wind and rain on the Oregon Coast.

Source: Wikipedia