Used 2015 Keystone MOUNTAINEER 331RLT

2015 Keystone Mountaineer 331RLT — Legendary Four-Season Comfort
Discover the proven quality and residential comfort of the 2015 Keystone Mountaineer 331RLT, a true four-season fifth wheel designed for RVers who want to travel year-round without sacrificing style, insulation, or livability.
At just under 37 feet long, the Mountaineer 331RLT offers a spacious interior layout with three slideouts, a bright rear living area, and Greystone interior decor that feels like home wherever you roam. Designed with input from real RV owners, this floorplan balances roomy living spaces with smart storage and thoughtful residential touches.
Built with Keystone’s legendary four-season package, this unit features an arched roof with consistent 5-inch thick roof insulation, R-10 laminated sidewalls, an R-21 insulated floor system with heat reflective Astro-Foil, and dual pane windows that provide added thermal efficiency and sound insulation. Water lines are fully enclosed and heated, dump valves and tanks are protected, and an insulated underbelly keeps your systems safe when temperatures drop.
Inside, you’ll find residential carpet with stain protection, durable vinyl flooring, a center kitchen with bench seating, a 3-burner oven/stove with overhead fan, and a 12 cu. ft 4 door, wood paneled refrigerator that runs on electric or propane. The spacious rear living area offers plenty of room to relax, entertain, and unwind.
Key Specs:
  • Length: 36.75 ft.
  • Width: 8 ft.
  • Height: 12.75 ft.
  • Dry Weight: 11,405 lbs.
  • Payload Capacity: 2,900 lbs.
  • GVWR: 14,305 lbs.
  • Hitch Weight: 2,305 lbs.
  • Fresh Water: 66 gal.
  • Gray Water: 93 gal.
  • Black Water: 50 gal.
  • Propane: 2 tanks, 60 lbs. total
Features:
  • Dual pane windows for improved insulation and comfort
  • Max Turn fiberglass front cap with improved turning radius and Hitch Vision mirror
  • Painted metallic front cap and colored hi-gloss gel-coat sidewalls
  • Automotive frameless deep-tint safety glass windows with UV inhibitor
  • Large drop-frame pass-through storage with insulated slam-latch doors
  • Electric front and rear stabilizer jacks for easy setup
  • MOR/Ryde™ CRE 3000 suspension and 8-lug Dexter E-Z Lube axles with Nev-R-Adjust™ brakes
  • 16” E-Range radial tires
  • 30” wide entry door with window, fold-away entry handle, rear roof ladder
  • 15,000 BTU Dometic A/C, wired and framed for a second A/C option
  • Fully walkable EPDM roof with 12-year warranty
  • Radiant Technology insulation package
  • Fully enclosed heated underbelly with enclosed low point drains
Whether you’re heading south for the winter or camping off the beaten path, the Mountaineer’s proven build quality, four-season protection, and timeless design help you stay comfortable and confident wherever the road leads.
Retail Price
$64,995
Arrkann RV Price
$44,999
Stock # 17938
Location Calgary
Year 2015
Make Keystone
Model MOUNTAINEER
Condition USED
Status ON ORDER

Specifications

General
Class FIFTH WHEEL
Length (FT) 36' 75"
Hitch Weight (LBS) 2305 LBS
Dry Weight (LBS) 11405 LBS
Sub Class Rear Living
Shop By Length 36-40 Ft
Shop By Weight Over10000 LBS
Total Fresh Water Tank Capacity (GAL/L) 66
Total Gray Water Tank Capacity (GAL/L) 93
Total Black Water Tank Capacity (GAL/L) 50
Total Propane Tank Capacity (GAL/LBS) 60
Gross Weight Rating (LB/KG) 14305 LBS
Awning Length (FT/M) 16'
Other Specifications
Hot Deals
2015 Keystone Mountaineer 331RLT — Legendary Four-Season Comfort
Discover the proven quality and residential comfort of the 2015 Keystone Mountaineer 331RLT, a true four-season fifth wheel designed for RVers who want to travel year-round without sacrificing style, insulation, or livability.
At just under 37 feet long, the Mountaineer 331RLT offers a spacious interior layout with three slideouts, a bright rear living area, and Greystone interior decor that feels like home wherever you roam. Designed with input from real RV owners, this floorplan balances roomy living spaces with smart storage and thoughtful residential touches.
Built with Keystone’s legendary four-season package, this unit features an arched roof with consistent 5-inch thick roof insulation, R-10 laminated sidewalls, an R-21 insulated floor system with heat reflective Astro-Foil, and dual pane windows that provide added thermal efficiency and sound insulation. Water lines are fully enclosed and heated, dump valves and tanks are protected, and an insulated underbelly keeps your systems safe when temperatures drop.
Inside, you’ll find residential carpet with stain protection, durable vinyl flooring, a center kitchen with bench seating, a 3-burner oven/stove with overhead fan, and a 12 cu. ft 4 door, wood paneled refrigerator that runs on electric or propane. The spacious rear living area offers plenty of room to relax, entertain, and unwind.
Key Specs:
  • Length: 36.75 ft.
  • Width: 8 ft.
  • Height: 12.75 ft.
  • Dry Weight: 11,405 lbs.
  • Payload Capacity: 2,900 lbs.
  • GVWR: 14,305 lbs.
  • Hitch Weight: 2,305 lbs.
  • Fresh Water: 66 gal.
  • Gray Water: 93 gal.
  • Black Water: 50 gal.
  • Propane: 2 tanks, 60 lbs. total
Features:
  • Dual pane windows for improved insulation and comfort
  • Max Turn fiberglass front cap with improved turning radius and Hitch Vision mirror
  • Painted metallic front cap and colored hi-gloss gel-coat sidewalls
  • Automotive frameless deep-tint safety glass windows with UV inhibitor
  • Large drop-frame pass-through storage with insulated slam-latch doors
  • Electric front and rear stabilizer jacks for easy setup
  • MOR/Ryde™ CRE 3000 suspension and 8-lug Dexter E-Z Lube axles with Nev-R-Adjust™ brakes
  • 16” E-Range radial tires
  • 30” wide entry door with window, fold-away entry handle, rear roof ladder
  • 15,000 BTU Dometic A/C, wired and framed for a second A/C option
  • Fully walkable EPDM roof with 12-year warranty
  • Radiant Technology insulation package
  • Fully enclosed heated underbelly with enclosed low point drains
Whether you’re heading south for the winter or camping off the beaten path, the Mountaineer’s proven build quality, four-season protection, and timeless design help you stay comfortable and confident wherever the road leads.
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