Enter the Park from the Rte 233 (Eagle Lake Road) entrance that’s about ¼ mile from Rte 3 intersection. Take the one-way direction toward Ocean Drive, Sand Beach, etc.
Stop at the first scenic overlook on your left. Directly across the road will be some steep steps that form the trailhead. After about 10-15 minutes of climbing, you’ll have a lovely view of Frenchmans Bay and Bar Harbor. tay here (in the general area where you have this view), then return.
You’ll drive along the Park Loop Road/Ocean Drive for a few miles before you come to an exit that will bring you back to Bar Harbor. There’ll be a few more beautiful scenic overlooks along the way.