A simple multi in a series of four that I hid while hiking this fantastic family friendly trail.
Unless you're looking to build a step count I recommend going after them starting with MULTI1.
Find two signs on a single post at the posted coordinates and use them to calculate the final:
N 50° 55.ABC W 114° 40.DEF
A = number of letters on second line of top sign
B = A plus number of letters on top line of top sign
C = number of letters on top line of top sign minus two
D = B-1
E = A
F = total number of letters on top two lines minus 2
Checksum: 35