Lake Ontario Ontario, which lies on the eastern end of the region, has the smallest surface area of the five Great Lakes. It is 193 miles long and 53 miles wide. Its average depth is 283 feet. Ways to ConnectFacebook Twitter Email Boaters warned of invasive species spread By Angelica Morrison • May 27, 2016 When you’re taking your boat out on the water this season, be sure you don’t bring along any hitchhikers. Great Lakes watershed gets new signs By Angelica Morrison • May 27, 2016 The next time you’re taking a leisurely drive through the region’s Great Lakes watershed, you'll find some new signage displayed along the way. Pages« first ‹ previous … 17 18 19 20