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Stock Number: 19089
Exterior Length: 42 ft 7 in
Sleeps: 6
Number of Slide Outs: 5
Condition: New
Number of Axles: Tandem
Description: New 2027 Keystone RV Montana 3800FL
Details: Keystone Montan fifth wheel 3800FL highlights: Five Slides Kitchen Island Dual Sofas Bath and a Half...
Updated: Thursday, August 27, 2026 10:39 AM
Location: Nacogdoches, Texas
Seller: RV Station-Nacogdoches
Stock Number: 19016
Condition: New
VIN: 4YDFM0V20V4700008
Description:
Updated: Thursday, August 27, 2026 10:39 AM
Location: Lorena, Texas
Seller: RV Station-Waco
Stock Number: 19016
Exterior Length: 42 ft 7 in
Sleeps: 6
Number of Slide Outs: 5
Condition: New
Exterior Color: MYSTIC WHITE
Description: New 2027 Keystone RV Montana 3800FL
Details: Keystone Montan fifth wheel 3800FL highlights: Five Slides Kitchen Island Dual Sofas Bath and a Half...
Updated: Thursday, August 27, 2026 10:39 AM
Location: Lorena, Texas
Seller: RV Station-Waco
Stock Number: 700240K
Exterior Length: 42 ft 7 in
Sleeps: 6
Number of Slide Outs: 5
Condition: New
Exterior Color: Frontier Gold Full Body Paint Option
Description: New 2027 Keystone RV Montana 3800FL
Details: LET'S TALK MAP PRICING! THE PRICE YOU SEE ADVERTISED IS THE MINIMUM ADVERTISED PRICE (MAP) SET BY THE...
Updated: Wednesday, September 02, 2026 09:46 AM
Location: Bryan, Texas
Seller: T&S RV & Sport - Bryan
Stock Number: RA6062A
Exterior Length: 40 ft 9 in
Sleeps: 4
Number of Slide Outs: 3
Condition: Used
Exterior Color: Cashmere, Cobalt, Sterling
Description: Used 2020 Keystone RV Montana 3810MS
Details: Keystone Montana fifth wheel 3810MS highlights: Patent-Pending Windshield Unique Master Suite Front...
Updated: Saturday, August 01, 2026 03:13 AM
Location: Ramsey, Minnesota
Seller: Markquart RV - Ramsey
Stock Number: F113SF
Exterior Length: 40 ft
Sleeps: 4
Number of Slide Outs: 3
Condition: Used
VIN: 4YDF38120L4702040
Description: Stock Number: F113SF40' 2020 Keystone Montana Legacy 3811MS w/3 Slides & Generator.Experience the pinnacle of luxury with this 2020 Montana Legacy ...
Updated: Wednesday, September 02, 2026 09:56 AM
Location: Summerfield, Florida
Seller: PPL Motor Homes - Summerfield
Stock Number: CFWK470121
Exterior Length: 40 ft 9 in
Sleeps: 4
Number of Slide Outs: 3
Condition: Used
Exterior Color: Cashmere, Cobalt, Sterling
Description: ✨ Luxury living meets open-road freedom in this 2019 Keystone Montana 3811MS! ✨
If you’ve been searching for the perfect balance of comfort, sty...
Updated: Wednesday, September 02, 2026 11:25 AM
Location: Early, Texas
Seller: Kanar RV Sales
Stock Number: 100765
Condition: Used
Description:
Updated: Saturday, September 05, 2026 03:36 AM
Location: Claremore, Oklahoma
Seller: Ron Hoover RV & Marine - Tulsa
Stock Number: 100765
Exterior Length: 40 ft 9 in
Sleeps: 4
Number of Slide Outs: 3
Condition: Used
Number of Axles: Tandem
Description: Used 2019 Keystone RV Montana 3811 MS
Details: Keystone Montana fifth wheel 3811MS highlights: Unique Master Suite Front Window Lounge Walk-In Cl...
Updated: Saturday, September 05, 2026 01:02 AM
Location: Claremore, Oklahoma
Seller: Ron Hoover RV & Marine - Tulsa
Stock Number: U00384
Exterior Length: 40 ft 9 in
Sleeps: 4
Number of Slide Outs: 3
Condition: Used
Exterior Color: Cashmere, Cobalt, Sterling
Description: Used 2019 Keystone RV Montana 3811MS
Details: Keystone Montana fifth wheel 3811MS highlights: Unique Master Suite Front Window Lounge Walk-In Clo...
Updated: Friday, August 28, 2026 03:02 AM
Location: West Middlesex, Pennsylvania
Seller: Best Choice Trailers and RV
Stock Number: 18389A
Exterior Length: 40 ft 9 in
Sleeps: 4
Number of Slide Outs: 3
Condition: Used
Number of Axles: Tandem
Description: Used 2018 Keystone RV Montana 3811MS
Details: Keystone Montana fifth wheel model
3811MS
highlights: Unique Master Suite Front Window Lounge Wal...
Updated: Thursday, August 27, 2026 10:39 AM
Location: Donna, Texas
Seller: RV Station Donna
Stock Number: 209971
Exterior Length: 40 ft 9 in
Sleeps: 4
Number of Slide Outs: 3
Condition: Used
Number of Axles: Tandem
Description: Used 2022 Keystone RV Montana 3813MS
Details: Keystone Montana fifth wheel 3813MS highlights: Front Master Suite Kitchen Island Rear Living Area ...
Updated: Wednesday, August 26, 2026 07:26 AM
Location: Huntsville, Alabama
Seller: Bankston Motor Homes of Hunstville
Stock Number: 5253T
Exterior Length: 38 ft
Sleeps: 4
Number of Slide Outs: 3
Condition: Used
Number of Axles: Tandem
Description: 2021 KEYSTONE MONTANA 3813 MS
Stock No. 5253T
$54,950.00
CALL/TEXT THOMAS MAY !!
JUST ARRIVED ON TRADE!!
VERY CLEAN INSIDE AND OUT!!
EVERY...
Updated: Thursday, September 03, 2026 05:43 PM
Location: Findlay, Ohio
Seller: Findlay Truck & RV
Stock Number: 356614
Exterior Length: 3 ft 5 in
Sleeps: 4
Number of Slide Outs: 3
Condition: Used
Exterior Height: 13 ft 4 in
Description: USED 2021 KEYSTONE MONTANA 3813MS – 356614
**Keystone Montana fifth wheel 3813MS highlights:**
- Hide-A-Bed Sofa
- Residential Refrigera...
Updated: Monday, August 17, 2026 10:16 AM
Location: Dover, Florida
Seller: General RV Center - Dover
Stock Number: LAG8022X
Exterior Length: 41 ft 9 in
Sleeps: 4
Number of Slide Outs: 3
Condition: Used
Number of Axles: Tandem
Description: Used 2021 Keystone RV Montana 3813MS
Details: ***COMING SOON*** Call for pricing: Keystone Montana fifth wheel 3813MS highlights: Hide-A-B...
Updated: Wednesday, August 19, 2026 11:21 AM
Location: Lagrange, Georgia
Seller: Southland RV LaGrange
Stock Number: 41870A
Exterior Length: 40 ft 9 in
Condition: Used
Exterior Width: 8 in
Exterior Height: 13 ft 4 in
VIN: 4YDF38120M4704517
Description: Overview Welcome Aboard the 2021 Keystone Montana 3813MS: Redefining Travel with Every Mile! The 2021 Keystone Montana 3813MS is not just an RV; it...
Updated: Saturday, August 29, 2026 03:38 AM
Location: Mesa, Arizona
Seller: RV Country - Mesa, AZ
Exterior Length: 40 ft 9 in
Sleeps: 4
Number of Slide Outs: 3
Condition: Used
Exterior Color: Modern Maple Edition
Number of Axles: Tandem
Description: Fabulous
2020 Keystone Montana 3813MS Triple Slide 5th Wheel
4 Seasons Living with Fireplace
Modern Maple Edition & Champagne Interior with R...
Updated: Thursday, August 27, 2026 08:03 AM
Location: Whitesboro, Texas
Seller: Starlight Motors, Inc.
Stock Number: 7695
Exterior Length: 40 ft
Sleeps: 4
Number of Slide Outs: 3
Condition: Used
Air Conditioning: Yes
Description: Front Bedroom - Front Bathroom: 3 Slides, Air, Awning, Slide Toppers, Back Ladder, 2 TV'S, Fireplace, Sofa/Bed, Theater Seating, Refrigerator, Mic...
Updated: Monday, August 17, 2026 11:13 AM
Location: Clyde, Ohio
Seller: Town & Country RV Center Inc.
Stock Number: C0802
Exterior Length: 40 ft 9 in
Sleeps: 8
Number of Slide Outs: 5
Condition: Used
Number of Axles: Tandem
Description: Used 2018 Keystone RV Montana 3820FK
Details: Keystone Montana fifth wheel 3820FK
highlights: Patent-Pending Front Windshield Design U-Shaped Di...
Updated: Thursday, August 27, 2026 11:12 AM
Location: Katy, Texas
Seller: RV Station-Katy
Stock Number: DU26082A
Exterior Length: 40 ft
Sleeps: 6
Number of Slide Outs: 5
Condition: Used
VIN: 4YDF38222J4700057
Description: Awnings
KEYSTONE MONTANA (2018) These Typical Features Vary by Model Four Season, Residential Living Packages Living Spaces Power Patio Awnings ...
Updated: Friday, September 04, 2026 11:29 AM
Location: Clinton, Missouri
Seller: Wilder RV
Stock Number: 356242
Exterior Length: 3 ft 4 in
Sleeps: 8
Number of Slide Outs: 5
Condition: Used
Exterior Width: 8 in
Description: USED 2018 KEYSTONE MONTANA 3820FK – 356242
Experience the ultimate in luxury and comfort with the 2018 Keystone Montana 3820FK. This fif...
Updated: Wednesday, September 02, 2026 03:33 AM
Location: Ocala, Florida
Seller: General RV Center - Ocala
Stock Number: 362319
Exterior Length: 3 ft 4 in
Sleeps: 8
Number of Slide Outs: 5
Condition: Used
Exterior Width: 8 in
Description: USED 2017 KEYSTONE MONTANA 3820FK – 362319
This Keystone Montana fifth wheel model 3820FK features a front raised kitchen that will make...
Updated: Monday, August 17, 2026 10:16 AM
Location: Dover, Florida
Seller: General RV Center - Dover
Stock Number: F168NB
Exterior Length: 40 ft
Sleeps: 2
Number of Slide Outs: 5
Condition: Used
VIN: 4YDF38224H4702533
Description: Stock Number: F168NB40' 2017 Keystone Montana Legacy 3820FK w/5 Slides.Experience the pinnacle of luxury travel with this 2017 Montana Legacy 3820F...
Updated: Wednesday, September 02, 2026 09:56 AM
Location: New Braunfels, Texas
Seller: PPL Motor Homes - New Braunfels
Stock Number: 93647C
Exterior Length: 40 ft 9 in
Sleeps: 8
Number of Slide Outs: 5
Condition: Used
Number of Axles: Tandem
Description: Used 2017 Keystone RV Montana 3820 FK
Details: This Keystone Montana fifth wheel model 3820FK features a front raised kitchen that will make you f...
Updated: Tuesday, September 01, 2026 09:57 AM
Location: South Windsor, Connecticut
Seller: Petes RV - Connecticut
Stock Number: MONT02219
Exterior Length: 40 ft 9 in
Sleeps: 8
Number of Slide Outs: 5
Condition: Used
Exterior Width: 8 ft
Description: Used 2016 Keystone RV Montana 3820 FK
Details: This Keystone Montana fifth wheel model 3820FK features a front raised kitchen that will make you f...
Updated: Friday, September 04, 2026 11:25 AM
Location: Seguin, Texas
Seller: America Go RV - Seguin
Stock Number: 5299
Exterior Length: 40 ft 11 in
Sleeps: 8
Number of Slide Outs: 4
Condition: Used
Number of Axles: Tandem
Description: Used 2022 Keystone RV Montana 3855BR
Details: Keystone Montana fifth wheel 3855BR highlights: Two Bedrooms Loft Kitchen Island Rear Living Area O...
Updated: Thursday, September 03, 2026 08:07 AM
Location: West Tawakoni, Texas
Seller: Lake Tawakoni RV Center
Stock Number: 359829
Exterior Length: 3 ft 4 in
Sleeps: 8
Number of Slide Outs: 4
Condition: Used
Exterior Width: 8 in
Description: USED 2021 KEYSTONE MONTANA 3855BR – 359829
## Keystone Montana 3855BR highlights
* Mid-Bunk Room
* Loft Sleeping Area
* Rear Living Room...
Updated: Monday, August 17, 2026 03:33 AM
Location: Mt. Clemens, Michigan
Seller: General RV Center - Mt. Clemens
Stock Number: 703353
Exterior Length: 40 ft 10 in
Sleeps: 8
Number of Slide Outs: 4
Condition: Used
Exterior Color: Cashmere, Cobalt, Sterling
Description: Used 2019 Keystone RV Montana 3855BR
Details: Keystone Montana fifth wheel 3855BR highlights: Bonus Room Loft Free Standing Dinette Residential R...
Updated: Tuesday, June 09, 2026 03:41 PM
Location: Desert Hot Springs, California
Seller: KARV
