There's a reasonably good FAA sponsored app to help drone owners with this problem: https://www.faa.gov/uas/recreational_fliers/where_can_i_fly/...
I find it often misses local city or park-level rules so I'd always use it in conjunction with a local jurisdiction's app (if available), as well as checking council websites etc.
[1]: https://play.google.com/store/apps/details?id=com.airmap.air...