Roughly 29 states allow double towing behind a fifth wheel for recreational use: Alaska, Arizona, Arkansas, California, Colorado, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maryland, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Mexico, North Dakota, Ohio, Oklahoma, South Dakota, Tennessee, Texas, Utah, and Wyoming. Permission is not blanket. Each of these states attaches its own conditions on total length, brakes, lighting, safety chains, and sometimes the type or weight of the second trailer, so a rig that is legal in Montana can be illegal in Kentucky.
Most permitting states require the first towed unit to connect by a fifth-wheel hitch rather than a bumper pull. Some limit the second trailer to recreational gear such as a boat or a utility trailer carrying ATVs. Treat each state’s rules as its own checklist.
States That Prohibit Double Towing
These states prohibit recreational double towing entirely: Alabama, Connecticut, Delaware, Florida, Georgia, Hawaii, Maine, Massachusetts, New Hampshire, New Jersey, New York, North Carolina, Oregon, Pennsylvania, Rhode Island, South Carolina, Vermont, Virginia, Washington, West Virginia, and Wisconsin. Every eastern coastal state from Maine to Florida bans it, with Maryland the lone exception. On the Pacific coast, both Oregon and Washington prohibit it, so a trip from Idaho to the ocean requires dropping the second trailer before you cross the line.
There is no “just passing through” exemption. A citation in a prohibition state usually comes with an order to unhitch on the spot, which can mean finding somewhere to park a trailer in unfamiliar territory or calling for a second driver or a local tow service.
Length Limits
Overall length is the regulation you are most likely to bump into. States that allow double towing commonly cap the combined length of all three units (truck, fifth wheel, and second trailer) somewhere between 65 and 75 feet. A few permit longer combinations, but that window covers the majority. Measure your rig bumper to bumper, including any cargo overhanging the rear, before your first trip.
Brakes, Chains, Lights, and Mirrors
Nearly every permitting state requires the second trailer to have its own functional brakes if it weighs more than a set threshold, typically between 1,500 and 3,000 pounds depending on the state. Breakaway brake systems are also widely required. A cable runs from the tow vehicle to a switch on the trailer; if the trailer separates, the switch locks its brakes. Federal rules for commercial trailers require those brakes to hold for at least 15 minutes after separation, and most states apply a similar standard to recreational trailers.1GovInfo. Federal Motor Carrier Safety Administration, DOT 393.45
Safety chains on the second trailer are required in every state that permits double towing, and the chain has to be strong enough to hold the trailer if the primary hitch connection fails. Michigan goes further and requires a locking mechanism on the safety chain for three-vehicle combinations. North Dakota allows automatic breakaway brakes as an alternative to safety chains.2RVIA. Safety Chain Requirements for RV Trailers – State Equipment and Road Use Law Summaries
All trailers in the combination need working taillights, brake lights, and turn signals. The rearmost trailer’s lights are what following drivers see, so test them before every trip. Most states also require side-view mirrors that give the driver a clear view of at least 200 feet behind the last trailer, which is why extended towing mirrors are common when factory mirrors fall short.
Driver’s License Class
In most states, a standard Class C driver’s license covers recreational double towing as long as the gross combination weight rating stays below the federal CDL threshold of 26,001 pounds. Above that, several states require a non-commercial Class A rather than a full commercial CDL. The non-commercial Class A involves a driving test with a heavy combination but skips the medical card, background check, and endorsements that commercial drivers need.
California is a frequent example. The California DMV requires a non-commercial Class A license for towing a travel trailer over 10,000 pounds GVWR or a fifth-wheel trailer over 15,000 pounds GVWR.3California DMV. California Driver License Classes Other states set their own breakpoints. Check the DMV site for every state on your route, because the wrong license class is its own citation even when your equipment is legal.
Planning a Trip Across State Lines
The practical headache is not the permitting states but the prohibition states in between. A run from Texas to the mid-Atlantic, for instance, may put you through Virginia or North Carolina, where double towing is flatly banned. Three realistic options exist: reroute to stay inside permitting states, drop the second trailer at the border and retrieve it on the way back, or hire a transport service to move it separately.
Dropping is the most common choice. RV parks and storage lots near state borders will sometimes take a trailer for a daily fee, but call ahead. Showing up with a boat trailer and no reservation can leave you scrambling. Many RVers plan their whole itinerary around the double-towing map, sticking to the band of permitting states across the Mountain West, Plains, Midwest, and parts of the South.
Laws also change between planning and departure. Verify current rules on each state’s department of transportation or highway patrol website before you leave. A list from last year’s forum post is a gamble that can cost you a fine and a lost afternoon on the shoulder.
Insurance Coverage
Standard auto and RV policies treat double towing inconsistently. Some cover any trailer attached to the insured vehicle; others exclude damage to or caused by a second towed unit. Before the first trip, call your insurer and get written confirmation that the policy covers the full combination, including liability for the second trailer. If it does not, ask about a rider or a separate trailer policy. A coverage gap discovered after an accident is an expensive lesson that a five-minute call prevents.
Liability does not shrink because the state allows the practice. If the second trailer breaks loose and causes a collision, you are responsible, and adequate liability limits matter more with a longer, heavier rig behind you.
What Federal Law Does and Doesn’t Do
There is no federal law that overrides a state ban or sets a national floor for recreational double towing. Federal truck size and weight rules under 23 CFR Part 658 exclude “recreational vehicles operating under their own power,” so the commercial double-trailer length limits do not apply to your fifth wheel and boat trailer.4eCFR. 23 CFR Part 658 — Truck Size and Weight, Route Designations The Federal Motor Carrier Safety Regulations, including hours-of-service and electronic logging requirements, also do not apply to drivers transporting personal property without compensation.5Federal Motor Carrier Safety Administration. Exemptions to the Federal Motor Carrier Safety Regulations State law is the controlling authority, which is why the state-by-state checklist matters so much.