The cache is (obviously) not at the posted coordinates.
To discover the final coordinates, you must complete the associated Adventure Lab, which will go live the afternoon of June 21, 2022. In order to do the Adventure Lab, you will need to install the appropriate app on your smartphone. Once you have completed it, you can get the location of this cache by assembling the partial coordinates provided at each stage of the Lab.
Hope you enjoyed your visit to this beautiful park!