A picture of a pink and purple sunset sky at the beach in Seaside, Oregon. Seaside contains 3 miles of powder-soft beach and 2 miles of manicured, ocean front boardwalk which make Seaside a popular tourist town. A pleasant 90 minute drive from Portland, Seaside is a first choice destination for north and southbound travelers. In Seaside you'll find dozens of delightful mini-malls, specialty boutiques, antique shops, art galleries, museums, arcades and cinemas.