At the posted location, you'll find a sign post with some useful information. On one side, you'll find 3 plaques with which you will use to deduce the coordinates for the second and final stage of this cache.
N39 ab.cde W76 wv.xyz
a = 2nd digit of the year the board was erected
b = # of letters in the first name of the scout on the bottom plaque
c = last digit of the year the board was erected
d = last digit of the Troop number on the bottom plaque
e = 1st digit of the Troop that erected the board
w = 2nd digit of the Troop on the bottom plaque minus the 3rd digit
v = 1st digit of the year the board was erected
x = number of the board
y = last digit of the Troop that erected the board
z = 1st digit of the Troop on the bottom plaque minus the 2nd digit
You're looking for a small jar.
Unless the weather is dreadful, you'll probably come across a muggle or two during your search.
Happy hunting!
Trail is open dawn to dusk only.