The Mammoth Overland TL — nicknamed “Tall Boy” — is the brand’s full-height off-road trailer, standing just under nine feet tall with 6’3″ of interior headroom and priced at $69,500. Built on the same aerospace-derived aluminum construction as the rest of the Mammoth lineup, the TL is designed to take families into the backcountry with a king bed, two full-length bunks, an indoor shower and sink, and a 50-gallon water tank — the largest in the lineup.
The Short Answer
The TL exists because Mammoth’s other teardrop trailers — the HV, WLY, and ELE — all share a 4’2″ interior cabin height. You can’t stand up in them, and they sleep two. For solo travelers and couples, that’s a reasonable trade for weight and simplicity. For families, it’s disqualifying.
The TL answers that with 6’3″ of interior headroom, sleeping for four, and an indoor bathroom, while keeping dry weight to 3,200 pounds — light for a full-height trailer with those amenities.
Full Specifications
Sleeping Four, Standing Up
The TL’s interior is organized around a king-size mattress with two full-length bunks — 6’2″ long and 2′ wide, long enough for a six-foot-two adult. The bunk converts to a couch-style seating area when not in use for sleeping.
The 6’3″ interior height is the spec that separates the TL from everything else in Mammoth’s teardrop lineup. It’s the difference between a place to sleep and a place to spend a rainy afternoon.
The Indoor Bathroom
The TL includes an indoor shower and sink with a 15″ × 25″ shower floor, plus a portable cassette toilet, all fed by on-demand hot water from the 50-gallon fresh water tank. That tank is more than double the 21 gallons carried by the HV, WLY, and ELE, which matters when four people are showering across a multi-day trip.
There’s also an outdoor shower hookup for rinsing gear or muddy dogs before anything comes inside.
Suspension: Dual Timbren 5200HD
The TL rides on dual Timbren 5200HD independent suspension — an axle-less design with no through-axle beam spanning the trailer underneath. Each of the four wheels operates on its own independent trailing arm.
Two things follow from that. First, ground clearance: a conventional trailer axle is usually the lowest point on the vehicle, and removing it entirely means there’s no beam to hang up on rocks or high centers. Second, articulation: each wheel moves independently, so an obstacle under one wheel doesn’t lift the opposite side.
Combined with 33″ BFGoodrich tires, steel rock sliders, and an off-road hitch as standard, the TL is meaningfully more capable than its size and amenity list would suggest.
Worth noting for tow vehicle planning: tongue weight is only 400 pounds despite the 3,200-pound dry weight, thanks to the tandem axle layout. That keeps a large share of the trailer’s mass off the tow vehicle’s payload capacity.
What Comes Standard
- Dual Timbren 5200HD independent suspension
- 33″ BFGoodrich tires with electric brakes
- Steel rock sliders and LED rock lights
- Off-road hitch, 2″ rear hitch receiver
- Modular roof rack with mounted ladder
- Galley kitchen: two-burner stove, sink, electric cooler/fridge
- 50-gallon water tank with on-demand hot water
- Indoor shower and sink, portable cassette toilet
- Outdoor shower hookup
- Two interior ventilation fans
- 23 Zero 270-degree awning
- REGO 400Ah lithium battery with 2,000W inverter
- Solar-ready: SAE hookup, solar controller, Bluetooth module
- Truma VarioHeat with integrated ignition, pre-plumbed propane
- Indoor/outdoor pass-through pantry
- King mattress plus modular bunk bed/couch
- Porthole windows plus two large windows doubling as emergency exits
Air conditioning and solar panels are both options rather than standard, and adding AC automatically includes the second battery.
How the TL Compares to the Rest of the Lineup
The TL and ELE are both $69,500, which makes the choice between them purely about use case rather than budget. The ELE is a two-person teardrop with a sealed pressurized cabin, air purification, bear-spray defense, and weapons storage. The TL is a four-person full-height trailer with an indoor bathroom and no survivalist systems.
Buyers who want both — the TL’s living space and the ELE’s security package — are looking at the XLE at $123,994.
Frequently Asked Questions
How much does the Mammoth TL cost? $69,500 base. Air conditioning, additional battery capacity, solar panels, and spare tire carriers are all options.
How tall is the Mammoth TL inside? 6’3″ of interior headroom, with an exterior height of 8’11.9″. It’s the only Mammoth teardrop-lineup alternative you can stand up in besides the XLE.
How many people can sleep in a Mammoth TL? Four — a king mattress plus two full-length bunks measuring 6’2″ by 2′.
Does the Mammoth TL have a bathroom? Yes. An indoor shower with a 15″ × 25″ floor, an indoor sink, and a portable cassette toilet, all fed by on-demand hot water from a 50-gallon tank.
What tow vehicle does the Mammoth TL need? Dry weight is 3,200 pounds with a 5,200-pound max gross and only 400 pounds of tongue weight. The low tongue weight relative to overall mass makes it manageable for half-ton trucks, though buyers should confirm against their specific vehicle’s ratings.
Is the Mammoth TL good off-road? Yes. Dual Timbren 5200HD axle-less independent suspension, 33″ BFGoodrich tires, steel rock sliders, and a standard off-road hitch make it capable on terrain that most full-height trailers can’t attempt.
Ready to build your own TL? Explore the full feature list or place your reservation directly with Mammoth Overland.