2018 Keystone Montana 3811
Smart Money Highlights
A single-owner 2018 Keystone Montana 3811MS Legacy Edition — a spacious triple-slide fifth wheel with a front master suite, a rear living-and-kitchen great room, and a residential kitchen. It left the factory with more than $27,000 in upgrade packages ($105,472 original MSRP when new) and has since been extensively upgraded by its owner.
Unit Specifications
13,400 lbs Dry | 40′ 9″
3 Slides | 50 Amp Service
- › 16,705 lbs GVWR · 2,705 lb hitch (factory)
- › Upgraded 8,000-lb axles · disc brakes
- › Six-point hydraulic auto-leveling
- › Queen bed · sleeps 4
- › Two power awnings
RV Highlights
Factory + Owner Upgrades
Equipped well beyond the base coach
- › Owner-added Onan 5.5 kW generator
- › Washer & dryer installed
- › Upgraded 8,000-lb axles, disc brakes & Roadmaster suspension
- › New tires, new batteries (2026) & central vacuum
- › Factory Four Season, Residential Living & Legacy packages
2018 Montana 3811MS Floorplan
Four-Season Living
All-Weather Ready
Four Season Living Package
- › Montana Four Season Living Package (zero-degree tested & rated)
- › Enclosed, heated underbelly
- › 35,000 BTU furnace + dual roof A/C
- › Roof-mounted solar prep for future panels
Length
40′ 9″
Gross Weight
16,705
lbs GVWR
Dry Weight
13,400
lbs
Sleeps
4
Slides
3
One Owner, Well-Upgraded
Single-owner coach with an owner-added generator, disc brakes & 8,000-lb axles.
Residential Kitchen
Island, 20 cu. ft. residential refrigerator & convection microwave.
Outdoor Entertainment
Exterior 32″ HDTV center to enjoy under the dual awnings.
“This single-owner 2018 Keystone Montana 3811MS Legacy Edition is a genuinely impressive triple-slide fifth wheel that lives large. Up front, a private master suite features Montana’s patent-pending window-lounge design and a walk-in wardrobe; step back through a dual-entry bath into a rear living-and-kitchen great room warmed by a fireplace and anchored by a center island and a 20 cu. ft. residential refrigerator. It left the factory with the Four Season Living, Residential Living, and Legacy Upgrade packages, six-point hydraulic auto-leveling, and an outdoor entertainment center — more than $27,000 in options toward a $105,472 original MSRP. Since then its owner has added a great deal: an Onan 5.5 kW generator, a washer and dryer, upgraded 8,000-lb axles with disc brakes and Roadmaster suspension, new tires and batteries, and a central vacuum. It’s a well-equipped, four-season home-away-from-home ready for the next long adventure.”
Fresh Water
66
gal
Gray Tank
88
gal
Black Tank
49
gal
Height
13′ 5″
Width
8′ 0″
Feature Explorer
Filter specifications to find what matters to you.
🍳 Kitchen
- • Center Kitchen Island
- • 20 cu. ft. Residential Refrigerator w/ Ice Maker
- • Convection Microwave
- • Furrion Oven/Range with Auto-Ignite
- • Pantry & Hutch Storage
- • Double Sink with Cover
🛋️ Living Room
- • Rear Living-and-Kitchen Great Room
- • Electric Fireplace
- • Power Theater Seating
- • New Recliners (owner-added)
- • Free-Standing Dinette w/ Storage
- • Flat-Screen HDTVs & LED Lighting
🛌 Master Suite
- • Queen Bed (King optional from factory)
- • Front Window-Lounge (Patent-Pending Design) w/ Under-Storage
- • Walk-In Wardrobe Closet
- • Washer & Dryer (owner-installed)
- • iRelax High-Density Mattress
🚿 Bathroom
- • Dual-Entry Bath (bedroom & main-living access)
- • Shower with Skylight
- • New Toilet (owner-replaced)
- • Medicine Cabinet & Vanity
- • Linen Storage
🌳 Outdoor Living
- • Outdoor Entertainment Center w/ 32″ HDTV
- • Two Power Awnings + Slide-Awning Package
- • Drop-Frame Pass-Through Storage
- • Two Spare Tires
- • MORryde “Step Above” Entry Steps w/ Strut
- • Exterior Speakers & TV Hookup
- • Dual Entry Assist Handles
🔌 Tech & Power
- • Six-Point Hydraulic Auto-Leveling
- • Onan 5.5 kW Generator (owner-added)
- • Micro-Air EasyTouch Smart Thermostat
- • Backup Camera & Keyless Entry
- • Electric Powered Cord Reel
- • New House Batteries (2026) & Central Vacuum
- • 1,000-Watt Inverter · Roof-Mounted Solar Prep (prep only — no panels installed)
- • 50 Amp Service
🏗️ Build Quality
- • Montana Legacy Upgrade Package
- • Upgraded 8,000-lb Axles, Disc Brakes & Roadmaster Suspension (owner-added)
- • Recently Repacked Wheel Bearings
- • Aluminum-Framed, Fiberglass Sidewalls
- • Patent-Pending Front Window Design
- • Flush-Mount Windows · Roof Access Ladder
💧 Systems
- • Four Season Living Package (zero-degree tested & rated)
- • Enclosed, Heated Underbelly
- • Dual Roof A/C (30,000 BTU total)
- • 35,000 BTU Furnace
- • Two MaxxAir Powered Roof Vents (one new in 2025)
- • 66 gal Fresh / 88 gal Gray / 49 gal Black · Two LP Tanks
🏷️ Value & Packages
- • $105,472 Original MSRP When New
- • Residential Living Package
- • Four Season Living Package
- • Legacy Upgrade Package
- • Six-Point Hydraulic Auto-Leveling
- • Outside Entertainment Center
Tire Information
The seller reports the tires have been replaced with new tires. YRVB will surface and disclose the DOT date codes prior to sale so buyers can verify the exact manufacture dates. Industry guidance generally recommends inspecting RV tires and considering replacement once they reach 5–7 years of age regardless of tread depth; YRVB will confirm the current tire dates as part of the pre-sale walkthrough.