Weeks before a crowd of skateboarders could ride down the new quarterpipe at Kenmore’s Prentiss Park for an Aug. 4 park celebration, a crew of volunteer skaters had to rake wet concrete into its forms. The ledges and curbs that sprang up from cracked tennis courts were the result of community input and experimenting — the park is rideable, but it’s not finished and will continue to evolve over time.
