If you are looking for a great family or individual activity that combines a hiking, map reading, and treasure hunting – you have got to try Geocaching. All it takes to get started is a GPS receiver and a web access.
Once you get your receiver and have a membership on the geocache site – you identify caches in your area, go find them, sign the log book at the cache, and then log the find online when you get home.
The family is collectively known as Team Jester – I am Jester42, Landon is Jesterjr91, Connor is Minijester, and Beverly has yet to create an account.
Check it out and let me know if you need any pointers.