01 What makes it unique
The 373RD is the plan most people picture when they picture a High Country. A separated rear living room sits up a step from the main floor, with power theater seating, two hide-a-bed sofas, a fireplace and a 50-inch TV — a genuine second living space rather than a rear wall of windows. Ahead of it is a residential kitchen with a three-burner glass-top range, a coffee station and a residential refrigerator; a king bedroom and a coat closet fill the front. It runs four slide-outs in a 41-foot-4-inch body that sleeps eight, with a residential 30-by-48-inch shower, on 7,000-pound Dexter Gladiator axles, a MORryde CRE-3000 suspension, Ground Control six-point electric auto-leveling and a 12-inch I-beam.
Published figures put the dry weight at 13,399 pounds and the dry pin at 2,780, and adding the 3,381-pound cargo capacity gives a 16,780-pound GVWR. A single 15,000-BTU Coleman Mach Quiet Series air conditioner with a heat pump, a 35,000-BTU furnace, an on-demand tankless water heater and 75/87/48-gallon fresh/grey/black tanks are standard. At a starting MSRP around $107,600, with street pricing below placard, the 373RD is the High Country for a couple or a small family who wants two separate living areas and a residential rear lounge — a firmly one-ton-friendly coach once loaded.
02 Full specifications
Dimensions
- Exterior length
- 41' 4"
- Exterior height
- 13' 4"
- Chassis
- 12" I-beam z-frame · Ground Control 6-point electric auto-level
Weights
- Dry / unit base weight (UVW)
- 13,399 lbs
- GVWR (max loaded)
- 16,780 lbs
- Net cargo / payload (CCC)
- 3,381 lbs
- Dry pin (hitch) weight
- 2,780 lbs
Capacities
- Fresh water
- 75 gal
- Grey water
- 87 gal
- Black water
- 48 gal
- Refrigerator
- 18 cu ft
Construction
- Front cap
- MaxTurn™ front cap · KeyShield™ automotive-grade paint
- Suspension
- MORryde CRE-3000 rubberized · wet-bolt fasteners
- Walls
- 2″ composite-backed high-gloss laminated fiberglass
- Roof
- Alpha seamless TPO membrane · fully walkable
- Underbelly
- Four Seasons Living (0°-tested) · enclosed & heated · forced hot air + electric tank heaters
Running gear
- Axles
- 2 × 7,000-lb Dexter Gladiator
- Hitch
- Fifth-wheel (in-bed) · MORryde rubber pin box
- Brakes
- Nev-R-Adjust self-adjusting
- Tires
- 16″ Rainier ST235/80R16 load-range-H
Galley & bath
- Range
- Three-burner cooktop · residential microwave
- Refrigerator
- GE 18 cu ft residential · 2,000W inverter
- A/C
- 1 unit · 15K BTU Coleman Mach Quiet Series ducted A/C w/ heat pump
- Water heater
- On-demand tankless
Sleeping & layout
- Sleeps
- 8
- Slides
- 4
- Entries
- 1
- Awnings
- 1
- Primary bed
- King
Drawn to scale
Weight budget
Size (no width published)
Holding tanks
Axles, wheels and nose shape are schematic; not a floorplan. Data: dataset.
Towing it
Loaded range: 15–25% of GVWR on the pin, a rule of thumb, not a measurement of this unit. No truck ratings or hitch classes (why; NHTSA, DOT HS 809 433). The range starts at the published dry figure, because loaded is never lighter than dry.
03 The Montana High Country floorplan family
Montana High Country is Keystone's lighter luxury fifth wheel, below the full-size Montana and cross-shopped against Grand Design's Reflection and Solitude, Forest River's Cedar Creek and Sabre, Alliance's Avenue and Jayco's Pinnacle. The 2026 line runs to eleven floorplans; the six broadest-appeal layouts are profiled in full, and the 373RD on this page is highlighted. The full lineup, including the catalogued plans, is on the line hub.
| Floorplan | Nominal | Sleeps | Notable |
|---|---|---|---|
| 295RL | 34 ft | 6 | Rear living, kitchen island, high payload |
| 351BH | 39 ft | 8 | Bunkhouse, triple slides |
| 385BR | 40 ft | 10 | Mid bonus room, loft, outdoor kitchen |
| 373RD | 41 ft | 8 | Elevated rear den, fireplace, king bed |
| 377FL | 41 ft | 10 | Front living, four slides |
| 381TB | 42 ft | 10 | Two full baths, two bedrooms, loft |
Montana High Country is Keystone's lighter, lower-profile luxury fifth wheel, positioned just below the full-size wide-body Montana on a standard-width chassis. The 2026 line runs to eleven floorplans; the six broadest-appeal layouts are profiled here in full and the rest are catalogued on the hub. Every High Country rides on 7,000-pound Dexter Gladiator axles with Nev-R-Adjust brakes, a MORryde CRE-3000 rubberized suspension and rubber pin box, and 16-inch load-range-H tires, with Ground Control electric auto-leveling (four-point on the smaller plans, six-point on the larger), a MaxTurn front cap with KeyShield paint, an Alpha seamless walkable TPO roof, 2-inch composite-backed fiberglass walls and a Four Seasons Living enclosed heated underbelly. The residential package is standard: a GE 18-cubic-foot refrigerator with a 2,000-watt inverter, a three-burner range, a 15,000-BTU Coleman Mach Quiet Series air conditioner with heat pump, a 35,000-BTU furnace, an on-demand tankless water heater, a central vacuum, a 5,000-BTU fireplace and a king bed. Dry weight and CCC are published figures and GVWR is shown as their sum; real loaded pin weights run higher — always weigh the loaded coach and confirm against your truck's payload and rear-axle ratings.
04 Notes on this floorplan
Elevated rear den
A separated rear living room up a step, with power theater seating, two hide-a-bed sofas and a fireplace — a real second living space.
Residential kitchen and bath
A three-burner glass-top range, coffee station and residential fridge, with a residential 30-by-48-inch shower in the bath.
Sleeps eight on four slides
Four slide-outs open up the 41-foot-4-inch body; the front king bedroom and a coat closet round out the plan.
One-ton territory loaded
A 16,780-pound-GVWR fifth wheel with a 2,780-pound dry pin — weigh the loaded coach and confirm your truck's payload and rear-axle ratings.
05 How it compares
A comparably sized luxury fifth wheel — the standard-width rear-den/family cross-shop.
Forest River’s luxury fifth wheel in the same length and price class.
The two-bath 381TB — longer, two bedrooms with two full baths and a queen loft.
06 Loading it for a trip
A full 75-gallon fresh tank is about 626 lb of water (water counts as cargo: 49 CFR 571.120 S10.4.2), 19% of the 373RD’s 3,381 lb cargo capacity, leaving 2,756 lb (344 lb per rated berth). Across 6 Montana High Country floorplans the water share runs 17% to 28%, and 4 give up more than this one. Nearest on that share: Montana High Country 295RL at 17% and Montana High Country 351BH at 19%. Your own unit’s figure is on the label inside its entry door (49 CFR 571.120 S10.4.3).
07 Where this floorplan sits
Closest sibling: the Montana High Country 351BH, nearest on the published figures. It differs on 5 of the 9 fields both publish (this plan first): length 41 ft 4 in vs 39 ft 0 in; dry weight 13,399 lb vs 13,278 lb; GVWR 16,780 lb vs 16,655 lb; cargo capacity 3,381 lb vs 3,377 lb; dry hitch weight 2,780 lb vs 2,655 lb. They match on sleeps, fresh tank, grey tank and black tank.
| Montana High Country plans | This plan | Position, low to high | Range |
|---|---|---|---|
| GVWR (lb) | 16,780 | 6 of 6 | 15,203–16,780 |
| Dry weight (lb) | 13,399 | 3 of 6 | 11,595–14,364 |
| Cargo capacity (lb) | 3,381 | 5 of 6 | 2,254–3,608 |
| Dry hitch weight (lb) | 2,780 | 6 of 6 | 2,455–2,780 |
| Length | 41 ft 4 in | 4 of 6 | 34 ft 0 in–42 ft 5 in |
| Grey tank (gal) | 87 | 2–5 of 6 | 78–135 |
| Black tank (gal) | 48 | 2–5 of 6 | 39–98 |
| Sleeps | 8 | 2–3 of 6 | 6–10 |
Either side of it by GVWR: Montana High Country 385BR is 95 lb lighter (16,685 lb GVWR).
| Nearest Montana High Country siblings | Length | Sleeps | Dry (lb) | GVWR (lb) | CCC (lb) | Hitch (lb) | Fresh (gal) |
|---|---|---|---|---|---|---|---|
| Montana High Country 373RD | 41 ft 4 in | 8 | 13,399 | 16,780 | 3,381 | 2,780 | 75 |
| Montana High Country 351BH | 39 ft 0 in | 8 | 13,278 | 16,655 | 3,377 | 2,655 | 75 |
| Montana High Country 385BR | 40 ft 9 in | 10 | 13,794 | 16,685 | 2,891 | 2,685 | 75 |
| Montana High Country 377FL | 41 ft 11 in | 10 | 13,513 | 16,620 | 3,107 | 2,620 | 75 |
| Montana High Country 295RL | 34 ft 0 in | 6 | 11,595 | 15,203 | 3,608 | 2,455 | 75 |
| Montana High Country 381TB | 42 ft 5 in | 10 | 14,364 | 16,618 | 2,254 | 2,705 | 75 |
All 6 Montana High Country floorplans: Montana High Country line hub.
| Other lines, nearest by GVWR | GVWR (lb) | Dry (lb) | Sleeps | Length |
|---|---|---|---|---|
| 373RD | 16,780 | 13,399 | 8 | 41 ft 4 in |
| Columbus 379MBL | 16,785 | 14,664 | — | 42 ft 7 in |
| Puma Mesa 379MBL | 16,785 | 14,664 | — | 42 ft 7 in |
| Nightfall 350N | 16,790 | 12,319 | — | 40 ft 6 in |
| Influence 3203GK | 16,800 | 12,712 | 3 | 35 ft 11 in |
| Cedar Creek 380DB | 16,815 | 15,024 | 10 | 43 ft 5 in |
| Wolf Pack 352PACK15 | 16,745 | 12,768 | — | 45 ft 0 in |
Against the 373RD: the Columbus 379MBL is 5 lb heavier and 1 ft longer; the Puma Mesa 379MBL is 5 lb heavier and 1 ft longer; the Nightfall 350N is 10 lb heavier.
08 Common questions about the 373RD
How much does the 373RD weigh?
13,399 lb dry; 16,780 lb GVWR, the most it may weigh loaded.
How much can the 373RD carry?
3,381 lb, 20% of its GVWR (median across 307 fifth wheels here: 19%). A full fresh tank uses 626 lb of it.
What is the pin weight of the 373RD?
2,780 lb dry, 21% of the dry weight (median across 386 fifth wheels here: 19%).
What size tow vehicle does the 373RD need?
A tow rating of at least 16,780 lb, plus payload for the loaded pin weight, passengers and cargo.
How many people does the 373RD sleep?
It is rated to sleep 8. 3 of the 6 Montana High Country floorplans that publish a count sleep more.
What are the tank capacities on the 373RD?
Fresh 75, grey 87, black 48 gallons. Off hookups, fresh water runs out first.
How long is the 373RD?
41' 4" overall, tongue or pin box included.
From the figures above.
09 What this page publishes, and what it does not
16 of the 18 fields this catalogue tracks are published for the 373RD. Not published: exterior width, interior height.
Sourcing rules: methodology.
10 Manuals & documents
Sources: keystonerv.com, library.rvusa.com (linked below); the full source note is at the foot of the page.
11 NHTSA safety record
NHTSA holds 10 recall campaigns and 14 owner complaints against the Montana High Country line. They are counted separately: a recall is a confirmed defect with a remedy, a complaint one owner’s unverified account.
What to look at on a used one. Across the 14 complaints filed on this line the most-reported components are unknown or other (36%), equipment (14%) and structure (14%).
Reports that name the 373RD
1 of those record name this floorplan specifically rather than the line as a whole.
| Type | Date | Reference | What it says |
|---|---|---|---|
| Complaint | 25 Mar 2021 | ODI 11404774 | Our brand new, $84,000, 2019 keystone RV montana high country 373RD, that we bought on 05-30-2019, was not built to applicable codes and standards, nor protected against fire and vehicle… |
Recall coverage here is not complete, and complaints are owners’ unverified reports (how this record is built). Check a specific VIN at NHTSA before you buy. Full tables are on the Montana High Country line page.