Walk or ride your bike along Barrie's waterfront trail! The trail stretches all the way around the bay.
Use the handy parking coordinates to park once to find all the caches along the waterfront.
The difficulty rating is only 1.5 because you do not need to descend! (Because descending here is a little tricky and could lead to serious slippage, which would make the difficulty rating a lot higher.)
You are looking for a camouflaged "scuba" tube.