Can a Catamaran Do the Great Loop?
Yes, some catamarans can do the Great Loop — but the answer is not just yes or no. It depends on beam, clearance, route flexibility, and how willing you are to accept marina limitations and planning friction in exchange for the living space and stability benefits.
Why people want cats
- Space, separation, and impressive liveaboard comfort.
- Stability at rest and often a very pleasant onboard feel.
Where cats get awkward
- Beam can reduce marina options and raise costs.
- Bridge clearance discipline becomes central fast.
- Some route choices get less forgiving if your numbers are tight.
Bottom line
A cat can work, but it is rarely the “easy mode” answer people imagine. It is a deliberate tradeoff boat.
The catamaran questions to answer first
Beam is the first practical filter. A wide cat may fit the route on paper but still struggle with transient slips, lock walls, fuel dock layouts, and older marinas built around narrower monohulls. Before shopping seriously, call marinas on the tight parts of the route and ask how they price and place a boat with your beam.
Air draft is the second filter. Some power cats are straightforward; some sailing cats require mast removal or route compromises. The relevant number is not the sales listing's optimistic height. It is the measured height in cruising trim, including antennas, radar, lights, arches, solar, dinghy gear, and anything else that will still be up when you approach a bridge.
When a cat makes sense
- You value apartment-like living space more than maximum marina flexibility.
- Your beam is manageable enough that you can still find routine transient slips.
- Your clearance plan is verified, not guessed from a listing.
- You are comfortable making more calls ahead instead of assuming every stop will fit.
Catamaran planning mistakes
The catamaran question often gets simplified to whether the boat can physically complete the Loop. The harder question is whether the crew wants the daily consequences: wider marina searches, different docking angles, possible price premiums, and fewer assumptions about slips fitting easily.
- Ask marinas how they price beam before assuming monohull dockage math.
- Check whether fuel docks and lock approaches work comfortably with your width.
- Do not ignore air draft just because beam gets the attention.
- Treat route flexibility as part of the purchase decision.
Publication notes
Written and maintained by TheCenterOf editors. Last reviewed: 2026-07-06. This page is planning guidance for boating and Great Loop readers. It is not a substitute for current charts, notices, marina confirmation, weather forecasts, official rules, professional advice, or onboard judgment.
Corrections, broken links, and first-hand route updates are welcome through the contact and corrections page.