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
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 What owners & reviewers report
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.