Broadway Park Seaside, Oregon Broadway Park is the City of Seaside’s largest park facility. It is the home for Seaside High School football and baseball. The site is flanked on the east by Neawanna Creek and by Seaside Middle School on the west. Complete master planning services included site analysis, citizen input, data gathering, and cost estimating for the nine plus acre park. Two park design alternatives included football, softball, skatepark, seating, parking, play areas, pathways, and creek frontage repairs.