Life on the Northeastern Shore.

Boulder Marina's Tradition

The only marina on the eastern shore.

A tradition since Carlyle Lake's very beginning, Boulder Marina is the only marina on the eastern shore — the largest man-made lake in Illinois.

Nestled adjacent to Boulder Campground, we sit within walking distance — and just a short sail or motor — to the popular Coles Creek Beach and Party Cove. Spend a sun-soaked afternoon swimming, let the kids play in the shallows, or drop anchor and join the fun at one of the lake's most popular gathering spots. Everything that makes a perfect lake day is right at your doorstep.

Whether you sail, motor, kayak, or paddleboard, our boaters are united by a shared passion for time on the water and a commitment to safe boating practices.

Boulder Marina is more than a full-service marina — it's a community of boaters who look out for one another and welcome newcomers into the fellowship of the lake.

What Makes Boulder Marina Unique?

What truly sets Boulder Marina apart is its welcoming, tight-knit community. Despite differences in age, background, or boat preference, our members aren't just fellow tenants — they're a second family. This isn't a community of elite "yachters," but real people who love the water. Some race, many paddle, most gather for social events, and all of us cherish every moment spent on the lake.

Many boaters use their vessels as cabins on the water — spending the night, soaking in the lake's ambiance, and waking up to its breathtaking views. It's a distinctly family-oriented community.

• All Boaters Welcome — Sailors, racers, cruisers, motor boats, pontoons, and newcomers.
• A Tight-Knit Community — Share stories, skills, and unforgettable memories.

Don't just sail — belong.