Placed on PA's 2014 Trail of the Year, the Redbank Valley Trail. Open dawn to dusk.
For new cachers......... the Fizzy Challenge is where you try to find at least 1 each of every possible Difficulty and Terrain combination - there are 81 of them, such as 1/1, 1/1.5, 1/2, etc. Besides bragging rights, there are challenge caches that require you to show proof that you have done this before you can log the cache as found. And after you've filled your Fizzy grid up once you can work on getting double, triple, etc fizzies (i.e. finding 2, 3, or more of each possible D/T combinations). Some people do this to complete challenge caches, some just set it as a personal goal. And there are a few people who search for mainly 5/5 caches, the most difficult ones.