iNat doesn’t have any control over where Google puts the pin for a given text-entered address. If you want to get a better location you have a few options:
- use a GPS-enabled device to location-stamp the photos as you take them
- use one of the methods suggested in the geotagging tutorial to apply coordinates after taking the photos
- manually edit the locations in iNat, either one at a time or using Batch Edit
- suggest an edit to the park in Google Maps to move their pin away from the entrance (but note that most people are probably using this pin for driving directions)
As cthawley said, also be mindful that the accuracy will affect the inclusion in the project – the accuracy circle must be completely contained within the bounding box of the project.
