As of 18th Oct 2021, there are 117 national parks open and 38 closed. There may be some restrictions for entering some open parks. Please find a spreadsheet informing about park closures by following this link. The spreadsheet is managed by DNP, not us, we have found out that it is not always up to date. If you are planning a trip to a park, best to call the park in question and get first hand information.