Explore Lake Ontario and the St. Lawrence River with PORTS Cruising Guide to Lake Ontario & the Thousand Islands. You’ll find detailed information on every port along the way, with expert advice on where to tie up, where to find supplies, where to eat and what to do when you get there. The PORTS Cruising Guide to Lake Ontario & the Thousand Islands is jammed with aerial photos, hydrographic chart references, GPS coordinates and in-depth local knowledge – it’s like having your own private tour guide aboard!