These coordinates take you to a park entrance. Use information on the plaque to determine actual cache coordinates.
This cache is designed to discourage the consumption of junk food. The idea is to pack a lunch and go for a little walk to acquire your meal toy rather than "waisting" your time at a fast food restaurant. The cache is full of fast food restaurant toys.
To determine the final cache location do the following:
Find the information regarding the donation of land for this park.
Add the number of acres donated, +581 = AAA
The year park was established, -1275 = BBB
The final coordinates are:
45° 25.AAA
122° 36.BBB