CACHE IS AT THE POSTED COORDS.
To qualify for this challenge you must find 100 caches that have 10 or more favorite points. You do not need to have a bookmark or list the caches as I can quickly see on your profile if you qualify.
You may find this cache prior to qualifying. Just sign the log and write a note on the cache page of your current favorite status. Then when you qualify you may claim the find on the cache.