Follow the trail towards the feed mill and go down a bit. You'll then see a pipe sticking out from the ground that has water bubbling out. It is completely free.
206, Church Avenue Box, Casco, WI 54205, US
Life Straw removes 99.999% of waterborn parasites so it is essential if you're drinking from an unknown water source. With proper use it provides 4,000 liters of clean and safe drinking water.