Tall Timbers Marina is one of the most unique marinas on the Illinois River boasting large decks and a screen porch where you can relax and enjoy the sights and sounds of the Illinois River. The Marina features 40 slips for boats up to 40' in length. We offer 91 octane, no ethanol, treated fuel for sale and have transient slips available for boats up to 40' for those just passing through.