This is a WherIgo playable cache. You use a cartridge to navigate your way from a starting point to the cache location. You can download the cartridge here and then proceed to the beginning coordinates to visit the zones and find the cache.
"Shade's Mills has been called the best-kept secret in Cambridge. Favourite activities in this day-use area include swimming, sport fishing and canoeing. The conservation area has 12 km of hiking trails through a mature hardwood forest that winds along Mill Creek. There is good fishing for northern pike, perch, largemouth and smallmouth bass in the 32-hectare (80 acre) reservoir behind Shade's Mills dam. It is open for cross country skiing, snowshoeing and ice fishing during the winter."
Regular entrance fees apply. See the website for details. Park closes at dusk.
http://www.grandriver.ca/index/document.cfm?Sec=27&Sub1=131