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Palomino River Ranch 399RL

Fifth wheelbuilt 2024– (in production)Mixed build tierCommon on the used market
WHAT ONE COSTS
—price not published

The maker never published an MSRP for this floorplan. Unknown is not cheap. Treat any asking price against comparable models, not against zero.

WHAT IT WEIGHS BEHIND YOUR TRUCK
~14,730 lbestimated as towed, for 2 people

dry weight 13,304 lb + fresh water (75 gal, full) 626 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 around16,370 lb (10% margin)
GVWR (the sticker maximum)15,999 lb
Tongue weight, loaded~2,757 lb (19%)
Cargo capacity2,695 lb
WHICH TOW VEHICLES IT FITS: 19 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 399RL'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 diesel) '11-1616,600 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 76it doesn't fit

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

THE SPECS
Length37.9 ft
Height (incl. A/C)13.5 ft
Width8.4 ft
Interior height7.0 ft
GVWR15,999 lb
Dry weight13,304 lb
Dry tongue weight2,490 lb
Cargo capacity2,695 lb
Sleeps4
Slide-outs4
Axles2
Fresh water75 gal
Grey water78 gal
Black water39 gal
Air conditioning40,500 BTU
Awning21 ft

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

WHERE PEOPLE SLEEP
  • 1× Front king bed(Permanent)72×80
  • 1× 88" split sleeper sofa(Convertible)—
HOW IT'S BUILT: 4/5
WallsAzdel composite
FrameAluminum
RoofStandard
UnderbellyEnclosed

Palomino (Mixed tier): Palomino's residential-style destination fifth wheel, built in Middlebury Indiana alongside Columbus; high-content build (Azdel, R-38/R-40 insulation, 8,000 lb axles, hydraulic leveling) but a young, low-volume line with little owner track record

YEAR BY YEAR: WHAT CHANGED
  • 2024Introduced; brochure GVWR of 17,999 lb later settled at 15,999 lb
FINDING ONE

Common: usually several for sale within a day’s drive. Why: Palomino is a volume manufacturer; still in production. Estimated from build volume and production span, not a count of live listings.

OUR TAKE

A shorter rear-living plan at 37'11". The 2024 brochure listed it at 17,999 lb GVWR with UVW 'TBD'; the settled production figures are 15,999 lb GVWR on 13,304 lb dry, so the brochure number appears to be a pre-production placeholder. Verify the yellow sticker on any unit.

OTHER RIVER RANCH FLOORPLANS
390RL · 17,999 lb · sleeps 4391MK · 15,999 lb · sleeps 2392MB · 17,999 lb · sleeps 7393RL · 17,999 lb · sleeps 4the whole line →
Find one for sale

Live listings for the 399RL 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 River Ranch line ↗

Is the 399RL 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 dealer and aggregator listings, retrieved 2026-07.