The Barking Up The Wrong Tree #4 cache is located along the Elbow Riverview Trail. The trail can be accesed from Paddy's Flats campground Loop E and also from a point where the trail crosses highway 66 where it continues on to connect with the Elbow Valley Trail, Sulpher Springs Trail and the Ing's Mine Trail.
Elbow River
You are looking for a small lock & lock.