Take a stroll along the small semi-secluded Tunnel Beach, which can only be accessed via a short manmade tunnel.
The main beach is located adjacent to Oceanside Beach State Park, which can be accessed via Cape Meares Loop/Netarts Oceanside Hwy.
Once you arrive at the park, head down towards the beach and start walking North. You'll notice a little hole-in-the-wall past a small group of rocks which you'll have to step over. Take precaution during storm season, as rocks above the tunnel entrance have been known to fall during inclement weather. Once in the tunnel, you'll want a source of light as there are plenty of rocks and logs to step over. The tunnel is short, so you'll reach the other side quickly, at which point you can stroll along the beach and view a small group of ocean rock formations to the North.
Pro tip: for some of the best food in the area, stop at the Blue Agate Cafe located right near the park off Pacific Ave.