Best Sailboats for the Great Loop

Two numbers that determine everything

Powerboaters doing the Great Loop worry mostly about fuel range and bridge timing. Sailors have two hard physical constraints that no amount of seamanship can override.

The first is draft. The Intracoastal Waterway (ICW) carries a federally maintained channel depth of 12 feet in most sections — but the controlling depth in practice is often 5 feet or less in Georgia, South Carolina, and the Gulf ICW. Shoal-draft anchorages, inland rivers, and the Tennessee-Tombigbee Waterway add further restrictions. A deep-keel sailboat that draws 6 or 7 feet will spend the Loop in a state of constant anxiety, threading narrow channels and sitting out tidal windows. Most experienced Great Loop sailors put the practical draft ceiling at 5 feet, and many prefer 4.5 feet or less.

The second is air draft — specifically mast height above the waterline. The Great Loop includes hundreds of fixed bridges, the lowest of which are found on the Erie Canal (15 feet above the water line) — but most of the critical chokepoints on a Loop itinerary run between 55 and 65 feet. The ICW itself has a minimum fixed bridge clearance of 65 feet, but that number applies to bridges on the main channel. Many marinas, anchorages, and cut-through routes have lower clearances. The practical mast height ceiling is 65 feet from the waterline, and boats running 60 feet or under have significantly more route flexibility.

Everything else — speed, interior volume, offshore capability — comes second to those two numbers.

The standard bearer: Island Packet 35

Ask any experienced sailor which monohull was purpose-built for exactly this kind of passage — shallow rivers, protected sounds, offshore coastal hops, and the occasional blue-water leg — and most will point to the Island Packet 35.

Designed by Bob Johnson and built in Largo, Florida between 1988 and 1994, the IP 35 was built around what Johnson called the Full Foil Keel — a keel that is integrated directly into the hull laminate rather than bolted on. Draft runs 4 to 4.75 feet depending on the specific build, comfortably under the Loop's practical ceiling. The mast height from the waterline is approximately 45 feet, which gives tremendous clearance even through the lowest fixed bridges. The cutter rig with its self-tacking staysail is manageable for a couple with no professional crew — exactly the demographic doing the Great Loop. Island Packet built 178 examples, and 17 or more typically appear on the used market at any time, priced between $69,000 and $180,000.

The IP 35 is not a fast boat. Its heavy displacement and long keel translate to hull speeds around 7.3 knots, and in light air it is slow to accelerate. But the Loop is not a race. The same qualities that make it slow make it extraordinarily comfortable on long days in chop. The boat tracks steadily under power — critical for the 600-plus miles of ICW motoring most loopers log — and its massive 85-gallon water tankage and 40-gallon fuel capacity reduce the urgency of provisioning stops.

If the IP 35 has a weakness for this application, it is the one that affects all long-keel boats: backing into slips under power requires practice. The rudder sits in the keel's wash at low speeds, and the first few dockings on a long-loop boat will educate any sailor accustomed to modern fin-keel handling.

Comparison table: Great Loop-qualified sailboats

Best for solo sailors: Hunter 34 (shoal draft)

The Hunter 34 is not the first name that comes up in Great Loop discussions, but it earns its place on this list. Hunter Marine produced it between 1983 and 1987, and the shoal-draft variant draws just 4 feet 3 inches — one of the lowest keels in the 34-foot class. Its masthead sloop rig keeps the mast at roughly 52 feet off the waterline, well inside the bridge clearance envelope.

What makes it interesting for solo sailors is the boat's genuine responsiveness. With a sail-area-to-displacement ratio near 18.6 and a light-air hull speed that exceeds most full-keel alternatives, the Hunter 34 actually moves in the 8-to-12-knot breezes common on the ICW and the Chesapeake. Nearly 1,000 were built, which means parts are widely available and the Hunter Owners Association maintains extensive technical archives. Median listing prices typically run well under the Island Packet alternatives, often in the $20,000-$45,000 range for well-maintained examples.

The caveats are real. The compression post base — a wooden block beneath the cabin sole that supports the deck-stepped mast — is prone to rot if water has been allowed to migrate down the mast conduit. Any survey should probe that block before purchase. The deck chainplates are also known to leak if the sealant hasn't been renewed in the past decade.

Best catamaran option: Gemini 105 MC

The Gemini 105 MC occupies a unique position in the Great Loop conversation. Designed by Tony Smith and built by Performance Cruising in Annapolis between 2003 and 2011, it is a 34-foot catamaran with a 14-foot beam — narrow enough to fit in standard monohull slips at most Loop marinas. That matters: large-beam catamarans often can't access the same slip infrastructure as monohulls, which complicates Great Loop logistics significantly.

The draft numbers are extraordinary. With the centerboards raised and the drive leg retracted, the Gemini 105 MC draws just 18 inches. With boards down, it extends to about 5.5 feet. Most ICW passages are made with boards raised, giving this boat access to anchorages and cuts that would strand any monohull. The mast height from the waterline has not been published as a standardized spec, but the rig dimensions (I = 29ft, P = 35ft) and mast position suggest a total height in the 55-60 foot range from waterline — within the bridge envelope.

The single Westerbeke diesel drives a steerable Sillette Sonic drive leg, which pivots in sync with the rudders to provide vectored thrust. Maneuvering in tight marina situations is far easier than a standard mono, and far simpler than twin-engine cats where you need to be conscious of differential throttle. The bridge deck, positioned low for slip compatibility, will slap in short-period chop — but on the protected waters that make up most of the Loop, that's rarely an issue.

Gemini 105 MCs are not cheap relative to monohull alternatives of similar age. Expect to pay $70,000-$130,000 for a well-equipped example.

Best on a budget: Hunter 34 (shoal draft)

For buyers with a $20,000-$40,000 budget, the Hunter 34 shoal-draft version is the most capable option that genuinely clears both Loop constraints. At that price level, the full-keel IP 35 begins to appear — but early examples require careful inspection of the aluminum tanks and chainplates. A well-surveyed Hunter 34 at $30,000 often represents a lower total-cost entry than a $65,000 IP 35 that needs $15,000 in deferred work.

Other budget alternatives worth investigating: the Gulfstar 37 (full keel, draft around 4.5ft, comfortable liveaboard layout), the Pearson 38 (fiberglass solid, draft under 5ft on early models), and various late-1970s Endeavour models from Clearwater, Florida — a brand that understood shallow Florida waters from its inception.

Most capable offshore before and after the loop: Caliber 35

The Caliber 35 is the non-obvious pick on this list. Designed by Michael McCreary and built by Caliber Yachts in Largo, Florida, the Caliber line was designed explicitly for sailors who wanted to do offshore work but also had access to the Gulf Coast's notoriously shallow waters. Draft runs approximately 4.5 feet with the standard keel — right at the Loop ceiling — and the hull carries a ballast-to-displacement ratio and construction quality that puts it firmly in the offshore-capable category.

Unlike the Island Packet, which has a relatively full entry for its size, the Caliber 35 is a faster hull that performs well upwind in open water. Sailors planning a Loop that begins with an offshore passage down the East Coast, or who want to extend their cruise into the Bahamas after completing the Loop, will find the Caliber's offshore résumé more compelling than most alternatives at this draft.

The Caliber brand is small enough that the used-boat market is thin — Caliber 35s are rarely available, and when they appear, they sell quickly and often above median for their age class. Treat any Caliber listing as urgent if the specs align with your plans.

What doing the Great Loop on a sailboat actually looks like

Most Great Loopers are on trawlers or powerboats. Sailboats represent roughly 5-10% of looper traffic in any given season. That minority status comes with real trade-offs — and a few genuine advantages.

The motor disadvantage is significant. A standard ICW day-run of 60-80 miles at 7 knots means 9-11 hours of engine time. Sailors doing this on a heavy-displacement monohull will burn 1-1.5 gallons per hour, comparable to many trawlers — but with no ability to reduce fuel consumption by raising sails in most protected channels where powerlines and bridges limit options. The Tennessee-Tombigbee Waterway and the lower Mississippi River crossing are effectively 100% motoring for sailboats. Budget accordingly.

The swing advantage is real. Shallow draft, particularly on centerboard cats or full-keel designs under 4.5ft, opens anchorages that powerboats of comparable size can't access. The ICW has dozens of protected "hurricane holes" and gunkholes that only shallow-draft vessels can reach. The Great Loop is more interesting — and less expensive — if you can anchor out more often than you tie up in paid marinas.

Mast stepping is worth pre-planning. The Erie Canal requires masts under 15 feet 6 inches above the waterline on some bridges; the typical workaround is stepping the mast (removing it) at the southern end of the canal in Waterford, NY, and re-stepping it at the northern end in Oswego. Most sailboat loopers do this. Mast-stepping services cost a few hundred dollars and take a few hours; the bigger variable is logistics — schedule the yard that will step your mast before you depart, not after you arrive.

Bridge timing is a shared concern for all sailboats regardless of mast height. Bascule bridges on the ICW open on scheduled intervals, and a 60-foot mast can only pass through an open drawbridge, not a closed one. This means sailboat loopers spend more time waiting for bridges than powerboaters doing the same route — plan 20-30 minutes of buffer per drawbridge section on the southern ICW.

Island Packet 350: the updated alternative

The Island Packet 350, produced from 1997 to 2004, is in many respects an improved IP 35. Bob Johnson evolved the hull slightly, added an integrated swim platform with a proper transom, and refined the interior. Draft is approximately 4.25 feet on the standard keel — slightly shallower than the 35. The mast height from waterline runs roughly 48 feet.

The 350 commands a premium over the 35 on the used market, typically $10,000-$20,000 more for comparable condition. Whether that premium is worth it depends on which interior layout you prefer: the 35 has slightly more traditional joinery; the 350 has a more modern feel with better natural light in the salon.

Both models are supported by the Island Packet Yacht Owners Association (IPYOA), which maintains one of the most thorough owner archives in sailboat history. For buyers doing their first extended cruise, that community is worth as much as the boat itself.

Your picks: great loop-ready sailboats

If the constraints above are met — draft under 5 feet, mast under 65 feet from the waterline — and the boat has a reasonable track record of loop completions, you have a candidate. The models in our collection below were selected for active market availability (two or more current listings at time of publication), real-world draft figures that work on the ICW, and a balance of interior comfort and mechanical simplicity appropriate for a months-long passage.