Stretching from Heceta Head in Northern Florence to Cape Arago in Southern Coos Bay, the Oregon sand dunes span 54 miles along the Oregon Coast. In fact, these dunes cover 40,000 acres making it the largest area of any dune system in the West Coast of North America.

What makes these dunes even more impressive is that they are over 100,000 years old. Studies show that individual sand grains originated from the Umpqua River making it the primary source of the Oregon Dunes.

Since 1972, the dune system is known as the Oregon Dunes National Recreation Area (ODNRA) and is managed by the USDA Forest Service thanks to Congress.

U.S. Highway 101 is the major coastal highway that runs through almost the entire Pacific Coast line from Northern Washington to Southern California, making it easy to access the dunes.

Nestled within them are many lakes making the Oregon Dunes a popular destination for outdoor adventure. In fact, the most popular activities to do are hiking, camping, and off-highway-vehicle (OHV) riding.

References

https://oregonencyclopedia.org/articles/oregon_dunes/#.W2IpcC2ZOb8