Unofficial dog parks are listed on the DogPack App map with a red pin. These parks are areas where dogs are allowed. In some of these areas, off-leash play is common, but it is important to verify the rules once you are there. These areas include big fields, parks, beaches, and trails where locals bring their dogs to play. Always make sure to follow local leash laws that apply.
To know which type of area it is exactly, head over to the park page and check the "Amenities" Section. This area of the app, along with the reviews section, will give you all the park information you need!