The Department of Public Works, Health and Human Services and Parks, Recreation and Marine hosted the pop-up event as part of the city's Earth Day celebration.
The seldom-used park is about to get a make-over that seeks to balance open spaces with activities. Ideas for the park include a walking path, adult and youth fitness stations and a youth bicycle education course.
The 51st Greenbelt will add more than 40 acres of new green space to Long Beach's 8th District.