From Hamilton follow the QEW towards Niagara. Cross the Garden City Skyway bridge. Take the Glendale Ave exit. Continue through two stop lights. Turn right on the first street after the second light. You should see a sign for GM Gate 12. Follow the road around and under Glendale Ave. At the stop sign you should see gate 12 to your right. Park your car here and walk down the gravel road ahead of you. Go under the railroad bridge and continue until you find the rock pile with the dirt mound directly behind it. Cross here and continue down the road until you see the pump house on the left. The road turns to the right here. Follow the road around the corner and watch for the pile of old railroad ties on the right. Just beyond the pile you should see a path that leads up and around. The path will lead down the hill and to the tunnel. Good luck and happy hunting. Be careful and please be respectful.