Geocaching may be the perfect Cascadia sport. It’s a puzzle (appealing to our inner geek), it’s an outdoor excursion (appealing to our inner jock), it’s a social trading game (yes, even cheerleaders can play). Geocachers hide containers with tradeable trinkets – pick one and keep it, and leave your trade inside. Cache stashes could offer small plastic toys, movie tickets, foreign money or stickers. Note your visit in the logbook with a stamp or signature, also kept in the container. Caches can be tucked away anywhere: city park, campground stream, old-growth tree or a mountain peak. How do you find these containers? With your Global Positioning System (GPS) device or cellphone, after retrieving instructions from a geocaching website (the most…