Tie up for the night or stay awhile. With protected docks, glowing river sunsets, great food and drinks, and an easygoing local vibe, Grafton Harbor Marina on the Great Loop is made for slowing down and enjoying the river. So much to do here! Charter a pontoon boat and explore the Mississippi and Illinois rivers. Step ashore for cool drink at our ARRR Bar (open seasonally). Grab a seat at the Grafton Oyster Bar, open nearly year-round, with St. Louis and nearby attractions just a short trip away before heading back out on the water.