You are looking for a Lock n Lock container just off the trails close to Dog Leg Pond, best access is if you approach from the nearby signs.
About the Chickakoo Lake Recreation Area
Chickakoo Lake Recreation Area is a beautiful scenic park located North of Stony Plain. Bring the family to enjoy a fishing trip, spend a few hours canoeing, mountain biking, or hiking through the park. Bring along a camera or binoculars to enjoy the diverse wildlife that live at Chickakoo. This 480-acre park has over 14 kilometres of scenic trails, which are perfect in the summer for walking or biking and in the winter trails are track set for cross country skiing.