A big letter A in the countryside to celebrate Albany as the site of the first cache in WA. 26 puzzle caches, but only a few puzzle types. Here's one to get you started.
The bulk of the caches will be released on the day of the 15th birthday bash.
Most of the hides are simply sistemas at the base of a tree. But not all. None of the caches contains a pen so make sure you take one.
This cache is hidden at S 34 58.abc E 117 43.def
The missing digits can be worked out from the picture below
You can check your answers for this puzzle on GeoChecker.com.