Keystone Montana High Country 391TB
Fifth wheelbuilt 2026– (in production)Mixed build tierFindable on the used market
WHAT ONE COSTS
$152,800MSRP today
Still in production. A used 2023 would run roughly $90,200.
WHAT IT WEIGHS BEHIND YOUR TRUCK
~17,307 lbestimated as towed, for 2 people
dry weight 15,865 lb + fresh water (77 gal, full) 642 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 around19,230 lb (10% margin)
GVWR (the sticker maximum)18,785 lb
Tongue weight, loaded~3,038 lb (18%)
Cargo capacity2,920 lb
WHICH TOW VEHICLES IT FITS: 14 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 391TB's published weights held steady. Fifth wheels also need a pickup bed and are held to the fifth-wheel rating where published.
The 81it doesn't fit
- Chevrolet Colorado / GMC Canyon (2.7 Turbo HO, tow pkg) '23-26: over by ~10,377 lb loaded
- Chevrolet Colorado / GMC Canyon (2.8 Duramax) '15-22: over by ~10,377 lb loaded
- Chevrolet Silverado / GMC Sierra 1500 (6.2 V8, max tow) '19-26: over by ~8,037 lb loaded
- Chevrolet Silverado / GMC Sierra 2500HD (Duramax) '20-23: over by ~647 lb loaded
- Chevrolet Silverado / GMC Sierra 2500HD (Duramax) '11-19: over by ~1,017 lb loaded
- Chevrolet Silverado 1500 (max tow) '14-18: over by ~6,867 lb loaded
- Chevrolet Silverado EV (4WT) '24-26: over by ~6,057 lb loaded
- Chevrolet Suburban (5.3 V8, max tow) '21-26: no pickup bed (cannot hitch a fifth wheel)
- Chevrolet Tahoe (5.3 V8, max tow) '21-26: no pickup bed (cannot hitch a fifth wheel)
- Chevrolet Traverse (tow pkg) '18-26: no pickup bed (cannot hitch a fifth wheel)
- Chrysler Pacifica '17-26: no pickup bed (cannot hitch a fifth wheel)
- Dodge Durango (5.7 / 6.4 Hemi, tow pkg) '14-26: no pickup bed (cannot hitch a fifth wheel)
- Ford Bronco 4-dr (2.7 EcoBoost, tow pkg) '21-26: no pickup bed (cannot hitch a fifth wheel)
- Ford Expedition (3.5 EcoBoost, tow pkg) '25-26: no pickup bed (cannot hitch a fifth wheel)
- Ford Expedition (3.5 EcoBoost, tow pkg) '18-24: no pickup bed (cannot hitch a fifth wheel)
- Ford Explorer (3.0 EcoBoost, tow pkg) '20-26: no pickup bed (cannot hitch a fifth wheel)
- Ford F-150 (3.5 EcoBoost, max tow) '24-26: over by ~7,587 lb loaded
- Ford F-150 (3.5 EcoBoost, max tow) '15-20: over by ~6,597 lb loaded
- Ford F-150 (3.5 EcoBoost, max tow) '21-23: over by ~4,707 lb loaded
- Ford F-150 (3.5 EcoBoost, max tow) '11-14: over by ~7,137 lb loaded
- Ford F-150 Lightning (max trailer tow) '22-26: over by ~8,307 lb loaded
- Ford F-250 Super Duty (6.7 diesel, tow pkg) '17-19: over by ~1,107 lb loaded
- Ford F-250 Super Duty (6.7 diesel) '11-16: over by ~2,367 lb loaded
- Ford Maverick (2.0 EcoBoost, 4K tow pkg) '22-26: over by ~13,707 lb loaded
- Ford Ranger (2.3 EcoBoost, tow pkg) '19-23: over by ~10,557 lb loaded
- Ford Ranger (2.7 EcoBoost, tow pkg) '24-26: over by ~10,557 lb loaded
- Ford Transit (HD tow pkg) '15-26: no pickup bed (cannot hitch a fifth wheel)
- GMC Acadia (tow pkg) '20-26: no pickup bed (cannot hitch a fifth wheel)
- GMC Hummer EV Pickup '22-26: over by ~10,557 lb loaded
- GMC Sierra EV '24-26: over by ~6,507 lb loaded
- GMC Yukon / Yukon XL (5.3 V8, max tow) '21-26: no pickup bed (cannot hitch a fifth wheel)
- Honda Odyssey '18-26: no pickup bed (cannot hitch a fifth wheel)
- Honda Passport (AWD) '19-26: no pickup bed (cannot hitch a fifth wheel)
- Honda Pilot (AWD, tow pkg) '16-26: no pickup bed (cannot hitch a fifth wheel)
- Honda Ridgeline (AWD) '17-26: over by ~12,807 lb loaded
- Hyundai Palisade (tow pkg) '20-26: no pickup bed (cannot hitch a fifth wheel)
- Hyundai Santa Cruz (2.5T AWD) '22-26: over by ~12,807 lb loaded
- Jeep Gladiator (3.6 V6, max tow) '20-26: over by ~10,377 lb loaded
- Jeep Grand Cherokee (5.7 Hemi) '11-21: no pickup bed (cannot hitch a fifth wheel)
- Jeep Grand Cherokee (WL, tow pkg) '22-26: no pickup bed (cannot hitch a fifth wheel)
- Jeep Grand Cherokee L (5.7 Hemi) '21-26: no pickup bed (cannot hitch a fifth wheel)
- Jeep Grand Wagoneer (Hurricane, max tow) '22-26: no pickup bed (cannot hitch a fifth wheel)
- Jeep Wagoneer (Hurricane, max tow) '22-26: no pickup bed (cannot hitch a fifth wheel)
- Jeep Wrangler Unlimited 4-dr (tow pkg) '18-26: no pickup bed (cannot hitch a fifth wheel)
- Kia Telluride (tow pkg) '20-26: no pickup bed (cannot hitch a fifth wheel)
- Land Rover Defender '20-26: no pickup bed (cannot hitch a fifth wheel)
- Land Rover Discovery '17-26: no pickup bed (cannot hitch a fifth wheel)
- Lexus GX 550 (tow pkg) '24-26: no pickup bed (cannot hitch a fifth wheel)
- Lexus LX 600 '22-26: no pickup bed (cannot hitch a fifth wheel)
- Mazda CX-90 (3.3 turbo, tow pkg) '24-26: no pickup bed (cannot hitch a fifth wheel)
- Mercedes-Benz Sprinter '19-26: no pickup bed (cannot hitch a fifth wheel)
- Nissan Armada (3.5 twin-turbo, tow pkg) '25-26: no pickup bed (cannot hitch a fifth wheel)
- Nissan Armada (tow pkg) '17-24: no pickup bed (cannot hitch a fifth wheel)
- Nissan Frontier (3.8 V6, tow pkg) '22-26: over by ~10,872 lb loaded
- Nissan Pathfinder (tow pkg) '22-26: no pickup bed (cannot hitch a fifth wheel)
- Nissan Titan (5.6 V8, tow pkg) '17-24: over by ~8,522 lb loaded
- Nissan Titan XD (Cummins diesel) '16-19: over by ~5,867 lb loaded
- Ram 1500 (3.0 Hurricane, max tow) '25-26: over by ~6,857 lb loaded
- Ram 1500 (5.7 Hemi eTorque, max tow) '19-24: over by ~5,832 lb loaded
- Ram 1500 (5.7 Hemi, max tow) '11-18: over by ~7,747 lb loaded
- Ram 2500 (6.7 Cummins) '11-18: over by ~1,127 lb loaded
- Ram ProMaster '14-26: no pickup bed (cannot hitch a fifth wheel)
- Rivian R1S '22-26: no pickup bed (cannot hitch a fifth wheel)
- Rivian R1T '22-26: over by ~7,407 lb loaded
- Subaru Ascent '19-26: no pickup bed (cannot hitch a fifth wheel)
- Subaru Outback (XT / Wilderness) '20-26: no pickup bed (cannot hitch a fifth wheel)
- Tesla Cybertruck '24-26: over by ~7,407 lb loaded
- Tesla Model X (tow pkg) '16-26: no pickup bed (cannot hitch a fifth wheel)
- Tesla Model Y (tow pkg) '21-26: no pickup bed (cannot hitch a fifth wheel)
- Toyota 4Runner (4.0 V6) '11-24: no pickup bed (cannot hitch a fifth wheel)
- Toyota 4Runner (i-Force Max) '25-26: no pickup bed (cannot hitch a fifth wheel)
- Toyota Grand Highlander (i-Force Max) '24-26: no pickup bed (cannot hitch a fifth wheel)
- Toyota Highlander (tow pkg) '20-26: no pickup bed (cannot hitch a fifth wheel)
- Toyota Land Cruiser (i-Force Max) '24-26: no pickup bed (cannot hitch a fifth wheel)
- Toyota Sequoia (i-Force Max, tow pkg) '23-26: no pickup bed (cannot hitch a fifth wheel)
- Toyota Sienna '21-26: no pickup bed (cannot hitch a fifth wheel)
- Toyota Tacoma (i-Force Max, tow pkg) '24-26: over by ~11,457 lb loaded
- Toyota Tacoma (V6, tow pkg) '16-23: over by ~11,187 lb loaded
- Toyota Tundra (5.7 V8, tow pkg) '11-21: over by ~8,127 lb loaded
- Toyota Tundra (i-Force Max, tow pkg) '22-26: over by ~6,507 lb loaded
- Volkswagen Atlas (tow pkg) '18-26: no pickup bed (cannot hitch a fifth wheel)
These verdicts assume 2 people aboard with typical gear. See the margin for your truck and your crew →
THE SPECS
Length43.9 ft
Height (incl. A/C)13.3 ft
Width8.4 ft
GVWR18,785 lb
Dry weight15,865 lb
Dry tongue weight2,785 lb
Cargo capacity2,920 lb
Sleeps9
Slide-outs3
Axles2
Fresh water77 gal
Grey water150 gal
Black water100 gal
Air conditioning45,000 BTU
Solar (standard)220 W
A missing row means the maker never published that figure: unknown, not zero.
WHERE PEOPLE SLEEP
- 1× front private bedroom king(Permanent)72×80
- 2× rear second-bedroom bunks(Permanent)—
- 1× loft(Convertible)—
- 1× dinette(Convertible)—
HOW IT'S BUILT: 4/5
WallsLaminated fiberglass
FrameAluminum
RoofWalk-on
UnderbellyEnclosed
Keystone (Mixed tier): The lighter half of Keystone's Montana family — a 101in wide body with frameless windows, six-point hydraulic auto-levelling, Curt slipper-roll suspension and a Helix pin box, plus a SolarFlex package standard. Good residential feel for the money; Keystone's volume-plant QC is the usual caveat.
YEAR BY YEAR: WHAT CHANGED
- 2026Introduced as the largest Montana High Country ever built
FINDING ONE
Findable: a few listed nationwide most weeks. Why: Keystone is a volume manufacturer; only one model year; still in production. Estimated from build volume and production span, not a count of live listings.
OUR TAKE
Nearly 44ft, three air conditioners, two full baths and 150gal of grey — a full-time-living fifth wheel. GVWR derived.
OTHER MONTANA HIGH COUNTRY FLOORPLANS
280CK · 14,300 lb · sleeps 4281CK · 14,250 lb · sleeps 4290RL · 16,255 lb · sleeps 4294RL · 14,300 lb · sleeps 6295RL · 15,300 lb · sleeps 6300RK · 15,700 lb · sleeps 4311RD · 15,600 lb · sleeps 6325RK · 15,985 lb · sleeps 6330RL · 14,260 lb · sleeps 6331RL · 16,580 lb · sleeps 6334BH · 16,000 lb · sleeps 8350BH · 16,000 lb · sleeps 8351BH · 16,655 lb · sleeps 8362RD · 16,000 lb · sleeps 8the whole line →
Find one for sale
Live listings for the 391TB on the big marketplaces. Each search opens pre-filled with this exact floorplan:
Inventory varies by site and day. Slim pickings? search the whole Montana High Country line ↗
Is the 391TB 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.