Been there, done that, got 50 t-shirts Challenge Mystery Cache

In 2010, Groundspeak added a new set of icons called souvenirs you can earn for caching in certain places, at certain events and on certain days.  Some souvenirs are awarded for finding a specific cache like The Lily Pad at Groundspeak HQ, while others are awarded for attending Mega events and finding an EarthCache on Earth Day.  Most recently Groundspeak has been publishing special souvenirs during August each year to get people off the couch and into nature. 

This challenge cache is at the posted location,

It is designed to reward those who have earned at least 50 souvenirs.  To claim the find, all you do is collect 50+ souvenirs and then go out and make the grab.  Where is the cache?  Anyone with 50 souvenirs on their account should be able to figure that out.

You are welcome to sign the log at any time, but you may not claim the find until you meet the requirements.  I have provided a checker from Project GC for you and you are encouraged to include the result in your log.

Since I would never put out a challenge cache I didn't qualify for (and it's a Groundspeak requirement), Project GC says I have earned 167 souvenirs.

Good luck!