The park provides direct views of the narrowest portion of the Puget Sound, known as the Narrows.
The beach is composed of mixed sand and cobble, typical of the glacial deposits found in the South Sound region.
The playground equipment is situated on a soft, sand-fill surface adjacent to the tide line.
The park is located directly adjacent to the BNSF Railway line, where heavy freight and passenger trains frequently pass.
The site hosts a small wetland area that acts as a natural drainage basin for upland runoff.
Sunnyside Beach Park is a saltwater beach park located along the Puget Sound in Steilacoom, Washington. The site features a sandy shoreline, a wooden playground, and designated picnic areas with views of the Olympic Mountains and Anderson Island. A paved promenade runs along the beach, providing accessibility for strollers and wheelchairs. The park serves as a primary access point for beachcombing and birdwatching in the area. Public amenities include restrooms and seasonal changing facilities. The beach is a popular location for launching non-motorized watercraft like kayaks and paddleboards. It is managed by the Town of Steilacoom and operates as a day-use public recreation area.
The bench overlooking the water at the northern end of the promenade during sunset.
Check local tide charts before visiting, as high tide significantly reduces the amount of walkable sandy beach.
Bring binoculars to observe marine life and the frequent maritime traffic passing through the channel.
Wear water shoes if you plan to walk near the water, as the shoreline transitions from sand to larger rocks and shells.
Do not attempt to cross the active train tracks at unauthorized points; use only the designated pedestrian crossings.
Restrooms may be winterized or closed during the off-season.
Dogs must be kept on a leash at all times; do not remove driftwood or natural resources from the beach.
