Oregon’s Best Beachside Paradise. As the official end of the Lewis and Clark Trail and the oldest coastal city in Oregon, Seaside lives up to its name: an oceanfront charmer that transports you back to the warm, nostalgic era when smaller, friendly beach towns dotted our nation’s coastlines. Most consider this spot to offer the finest ocean swimming and waterfront views in the state. Not all the fun is old-fashioned — there’s a ton of shopping, dining, sightseeing and activities, too. Consider this your idyllic spot for a romantic getaway or the quintessential family beach vacation.