This is a multi stage puzzle cache with one Field Puzzles.
Finding the FINAL stage
At the posted coordinates there is a park sign that has three words on it.
The coordinates of the first stage is N 42 05.ABC W 83 26.DEF
W = The total number of letters in the three words
X = The number of letters in the second word
A = X - 2
B = W - 8
C = 2X - 1
D = X + 1
E = W/2
F = W - 2X
The check sum of all six numbers is 35
The Eastern Bluebird
Eastern bluebirds are found east of the Rockies, southern Canada to the Gulf states, and southeastern Arizona to Nicaragua. The increase in trees throughout the Great Plains during the past century due to fire suppression and tree planting facilitated the western range expansion of the eastern bluebird as well as range expansions of many other species of birds. The bright-blue breeding plumage of the male, easily observed on a wire or open perch, makes this species a favorite of birders. The male's call includes sometimes soft warbles of 'jeew' or 'chir-wi' or the melodious song 'chiti WEEW wewidoo' Credit:Wikipedia
Crosswinds Marsh Rules
No fires
No bikes / ATVs / personal watercraft
No swimming or ice fishing
Dogs must be leashed
No alcohol or illegal substances
No camping
Fishing in designated areas only
Collecting of plants & animals prohibited
Park only at N 42 05.744 W 83 26.552
All Geocachers must follow the above rules.
Crosswinds Marsh is open from DAWN to DUSK.