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Heartland Landmark Oshkosh

Fifth wheelbuilt 2017–21Better build tierFindable on the used market
WHAT ONE COSTS
$92,300est. used (2021, 5 yr old)

Sticker was $144,330 in 2020. Out of production since 2021, so the used market is the only way to buy one. Estimate assumes a 2021 unit.

WHAT IT WEIGHS BEHIND YOUR TRUCK
~15,994 lbestimated as towed, for 2 people

dry weight 14,527 lb + fresh water (80 gal, full) 667 lb + propane + battery 200 lb + gear for 2 600 lb. Brochure dry weight omits water, propane, batteries and your gear; this estimate doesn't.

You want a tow rating around17,775 lb (10% margin)
GVWR (the sticker maximum)18,000 lb
Tongue weight, loaded~3,193 lb (20%)
Cargo capacity3,421 lb
WHICH TOW VEHICLES IT FITS: 18 OF 95

Judged the way the app judges: estimated loaded weight against each vehicle's rating less a 10% margin, per model year, because the Oshkosh's published weights held steady. Fifth wheels also need a pickup bed and are held to the fifth-wheel rating where published.

VEHICLETOW RATINGVERDICT
Chevrolet Silverado / GMC Sierra 2500HD (Duramax, max tow) '24-2622,500 lbfits, loaded, with 10% margin
Chevrolet Silverado / GMC Sierra 2500HD (Duramax) '20-2318,510 lbfits, loaded, with 10% margin
Chevrolet Silverado / GMC Sierra 2500HD (Duramax) '11-1918,100 lbfits, loaded, with 10% margin
Chevrolet Silverado / GMC Sierra 3500HD (Duramax DRW, gooseneck) '20-2636,000 lbfits, loaded, with 10% margin
Chevrolet Silverado / GMC Sierra 3500HD (Duramax DRW, gooseneck) '11-1923,300 lbfits, loaded, with 10% margin
Ford F-250 Super Duty (6.7 diesel, gooseneck) '20-2222,800 lbfits, loaded, with 10% margin
Ford F-250 Super Duty (6.7 diesel, tow pkg) '17-1918,000 lbfits, loaded, with 10% margin
Ford F-250 Super Duty (6.7 HO diesel, gooseneck) '23-2623,000 lbfits, loaded, with 10% margin
Ford F-350 Super Duty (6.7 diesel DRW, gooseneck) '17-1932,500 lbfits, loaded, with 10% margin
Ford F-350 Super Duty (6.7 diesel DRW, gooseneck) '20-2237,000 lbfits, loaded, with 10% margin
Ford F-350 Super Duty (6.7 diesel DRW, gooseneck) '11-1621,600 lbfits, loaded, with 10% margin
Ford F-350 Super Duty (6.7 HO diesel DRW, gooseneck) '23-2638,000 lbfits, loaded, with 10% margin
Ford F-450 Super Duty (6.7 HO diesel DRW, gooseneck) '23-2640,000 lbfits, loaded, with 10% margin
Ram 2500 (6.7 Cummins HO) '19-2620,000 lbfits, loaded, with 10% margin
Ram 2500 (6.7 Cummins) '11-1817,980 lbfits, loaded, with 10% margin
Ram 3500 (6.7 Cummins DRW, gooseneck) '13-1831,210 lbfits, loaded, with 10% margin
Ram 3500 (6.7 Cummins HO DRW, gooseneck) '25-2636,610 lbfits, loaded, with 10% margin
Ram 3500 (6.7 Cummins HO DRW, gooseneck) '19-2437,090 lbfits, loaded, with 10% margin
The 77it doesn't fit

These verdicts assume 2 people aboard with typical gear. See the margin for your truck and your crew →

THE SPECS
Length39.2 ft
Height (incl. A/C)13.3 ft
Width8.0 ft
Interior height7.2 ft
GVWR18,000 lb
Dry weight14,527 lb
Dry tongue weight2,900 lb
Cargo capacity3,421 lb
Sleeps4
Slide-outs4
Axles2
Fresh water80 gal
Grey water90 gal
Black water45 gal
Air conditioning30,000 BTU
Awning18 ft

A missing row means the maker never published that figure: unknown, not zero.

WHERE PEOPLE SLEEP
  • 1× front king bed(Permanent)70×80
  • 1× dinette converts to a bed(Convertible)—
  • 1× hide-a-bed sofa(Convertible)—
HOW IT'S BUILT: 5/5
WallsAzdel composite
FrameAluminum
RoofWalk-on
UnderbellyEnclosed

Heartland (Better tier): Heartland's flagship luxury fifth wheel, rebranded Landmark 365 in 2015 - Azdel walls on a double-welded aluminum cage, vacuum-bonded floors, 8,000 lb axles and three A/C units; floorplans are named after cities rather than numbered.

YEAR BY YEAR: WHAT CHANGED
  • 2017Introduced
FINDING ONE

Findable: a few listed nationwide most weeks. Why: Heartland is a volume manufacturer. Estimated from build volume and production span, not a count of live listings.

OUR TAKE

Under 40 ft with 3,400 lb of cargo capacity - the practical full-timer's Landmark.

OTHER LANDMARK FLOORPLANS
Arlington · 18,000 lb · sleeps 4Ashland · 18,000 lb · sleeps 4Charleston · 18,000 lb · sleeps 2Chesapeake · 18,000 lb · sleeps 4Concord · 18,000 lb · sleeps 6Daytona · 18,000 lb · sleeps 4Key West · 18,000 lb · sleeps 4Lafayette · 18,000 lb · sleeps 6Louisville · 18,000 lb · sleeps 2Madison · 18,000 lb · sleeps 4Newport · 18,000 lb · sleeps 4Phoenix · 18,000 lb · sleeps 6Rainier · 18,000 lb · sleeps 4Scottsdale · 18,000 lb · sleeps 4the whole line →
Find one for sale

Live listings for the Oshkosh on the big marketplaces. Each search opens pre-filled with this exact floorplan:

RV Trader ↗Camping World ↗FB Marketplace ↗Google ↗

Inventory varies by site and day. Slim pickings? search the whole Landmark line ↗

Is the Oshkosh your #1, or just a spec sheet?

These are the facts. Whether it beats the other six thousand rigs for you depends on what you care about. Set your priorities as sliders, switch on your hard limits, and watch the whole market re-rank around them. Every exclusion explained, every margin shown.

See where it ranks for you →

Data compiled from manufacturer spec sheets, retrieved 2026-07.