Indeed, see https://wiki.openstreetmap.org/wiki/Legal_FAQ#Can_I_trace_data_from_Google_Maps/Nokia_Maps/...?

If you are unsure whether a map can be copied, it would be the safest to assume that it can't.

For this specific case, the easiest solution would be just visiting the site, as park names are usually signposted, and this location is not inconvenient to get to.