The Missing, by Flying Moose
The missing is a letterbox hybrid consisting of 3 legs. Park off Hunter Mill road next to the crossing of the W&OD trail. The trail is directly in front of you and Hunter Mill will be on your right.
Cross Hunter Mill and look for a stretching post shaped like a cross. This is the first 'Grave Marker'.
The tall power structures are the 'Giants'. Walk down the paved path until you hit the third tower. You will be in front of a bridge.
Turn left to follow the river, this is the 'Brown Snake'.
Look for a fire pit off the trail, that is the "Firey Pit of Doom."
On your left in the forest is a tree with a broken trunk and one large branch extending from it. This is the 'Monster". See spoiler picture one.
Directly behind the monster is a tree with 2 trunks, that's the "Hydra" where the cache is hidden, see picture 2.
There are several 2 trunk trees in the area, so look for the one in the picture. The cache is hidden on the trunk where the trees come together. It is a square plastic box covered in camo tape.
Have fun!
-TeamTiki
Spoiler Pictures, do not look if you want to find it yourself!
PICTURE ONE, THE MONSTERPICTURE TWO, THE HYDRA/CACHE LOCATION