You are looking for a well-hidden, small (not quite a micro)
cache.
There is room for coins and other small trading items. Have fun,
be
stealthy, and Happy Cachin'! You may want to do this one during
non-school hours as it runs behind the Hall School in
Portland. Permission has been obtained from the school.
They just ask that if you use the trail during the day,
that you come in to the school office and sign in.
Cache contains logbook and pen, geo-coin, and an unactivated TB
set for the FTF.