2021 Keystone RV Montana High Country 377fl Specs
Can Your Vehicle Tow This?
Interactive towing compatibility checker
Select Your Tow Vehicle
RECOMMENDED TOW VEHICLES
Ford F-250
Up to 22,800 lbs
Ram 2500
Up to 20,000 lbs
Chevy 2500HD
Up to 22,500 lbs
GMC 2500HD
Up to 22,500 lbs
Safe Towing Capacity
80%
Under capacity
Safe zone
Max rating
Essential Upgrades for the 2021 Keystone RV Montana High Country 377fl
Towing & Dimensions
| Specs | Value | Buy | Shop All | Top 5 |
|---|---|---|---|---|
| GVWR | 16460 lbs | - | - | - |
| Dry Weight | 12985 lbs | - | - | - |
| Hitch Weight | 2465 lbs | - | - | - |
| Payload Capacity | 3475 lbs | Coil SumoSprings | Shop Suspension Kits | - |
| Length | 503 in | Furrion Backup Camera | Shop Cameras | - |
| Width | 96 in | Clip On Mirrors | Shop Mirrors | - |
| Exterior Height | 160 in | Telescoping Ladder | Shop Ladders | - |
Specs
Buy Now
More
GVWR
16460 lbs
Dry Weight
12985 lbs
Hitch Weight
2465 lbs
Payload Capacity
3475 lbs
Length
503 in
Width
96 in
Exterior Height
160 in
Towing & Dimensions Best Sellers
Top-rated products RV owners use to upgrade or maintain their RV.
Electrical & Solar
| Specs | Value | Buy | Shop All | Top 5 |
|---|---|---|---|---|
| Battery Converter Amps | 60 | - | - | - |
| Shore Power | 30 Amps | - | - | - |
| Battery Type | 12V Lead-Acid | Renogy 100Ah LiFePO4 | RV Batteries | Top 5 |
| Solar Pre-Wired | Optional | - | - | - |
| Inverter | Optional | - | - | - |
Specs
Buy Now
More
Battery Converter Amps
60
Shore Power
30 Amps
Battery Type
12V Lead-Acid
Solar Pre-Wired
Optional
Inverter
Optional
Electrical & Solar Best Sellers
Top-rated products RV owners use to upgrade or maintain their RV.
Tank Capacities
| Specs | Value | Buy | Shop All | Top 5 |
|---|---|---|---|---|
| Number Of Fresh Water Holding Tanks | 1 | - | - | - |
| Number Of Gray Water Holding Tanks | 1 | - | - | - |
| Number Of Black Water Holding Tanks | 1 | - | - | - |
| Fresh Water Tank Capacity | 66 gal | - | Fresh Water Tanks | - |
| Gray Water Tank Capacity | 78 gal | - | - | - |
| Black Water Tank Capacity | 39 gal | - | Back Water Tanks | - |
| Number Of Propane Tanks | 2 | - | - | - |
| Propane Tank Capacity | 60 lbs | 30Lb Propane Tank | Propane Tank Capacity | - |
Specs
Buy Now
More
Number Of Fresh Water Holding Tanks
1
Number Of Gray Water Holding Tanks
1
Number Of Black Water Holding Tanks
1
Fresh Water Tank Capacity
66 gal
Gray Water Tank Capacity
78 gal
Black Water Tank Capacity
39 gal
Number Of Propane Tanks
2
Propane Tank Capacity
60 lbs
Tank Capacities Best Sellers
Top-rated products RV owners use to upgrade or maintain their RV.
Tires & Wheels
| Specs | Value | Buy | Shop All | Top 5 |
|---|---|---|---|---|
| Rear Tire | ST235/80R 16F Full Spec | - | - | - |
| Rear Wheel Diameter | 16 | - | - | - |
| Rear Tire Aspect Ratio | 80 | - | - | - |
| Wheels Composition | Aluminum | - | - | - |
| Rear Brake Type | Electric Drum | - | - | - |
| Rear Tire Width | 235 | - | - | - |
| Spare Tire Location | Exterior Mounted | - | - | - |
| Front Brake Type | Not Applicable | - | - | - |
| Rear Tire Speed Rating | F | - | - | - |
Specs
Buy Now
More
Rear Tire
ST235/80R 16F Full Spec
Rear Wheel Diameter
16
Rear Tire Aspect Ratio
80
Wheels Composition
Aluminum
Rear Brake Type
Electric Drum
Rear Tire Width
235
Spare Tire Location
Exterior Mounted
Front Brake Type
Not Applicable
Rear Tire Speed Rating
F
Heating & Cooling
| Specs | Value | Buy | Shop All | Top 5 |
|---|---|---|---|---|
| Air Conditioning Type | Automatic | Dometic 13.5K Air Conditioner | Shop All RV AC | - |
| Water Heater Tank Capacity | 12 g | RV Tank Water Heater | RV Water Heaters | - |
| Heater Type | Automatic | - | - | - |
| Water Heater Pump Power Mode | Electrical / Propane | - | - | - |
Specs
Buy Now
More
Air Conditioning Type
Automatic
Water Heater Tank Capacity
12 g
Heater Type
Automatic
Water Heater Pump Power Mode
Electrical / Propane
Heating & Cooling Best Sellers
Top-rated products RV owners use to upgrade or maintain their RV.
Living Room / Bedroom(s)
| Specs | Value | Buy | Shop All | Top 5 |
|---|---|---|---|---|
| Number Of Recliner / Rockers | 2 | - | - | - |
| Master Bedroom Door Style | Conventional Door | - | - | - |
| Master Bedroom Mirror Doors | Yes | - | - | - |
| Number Of Convertible / Sofa Beds | 3 | - | - | - |
| Sofa Material | Leather | - | - | - |
| Master Bedroom Location | Rear | - | - | - |
| Living Area Location | Front | - | - | - |
| Reclining Sofa | No | RV Loveseat Recliner Sofa | Shop Sofa | - |
| Number Of Bunk Beds | 2 | - | - | - |
| Number Of Sofas | 2 | Tri-Fold Sofa | - | - |
| Full Size Master Bedroom Closet | Yes | - | - | - |
| Master Bedroom Flooring Type | Vinyl | - | - | - |
| Master Bedroom Shades / Curtains | Yes | - | - | - |
| Number Of Queen Size Beds | 1 | Queen RV Mattress | Shop Mattresses | - |
| Number Of Bathrooms | 1 | - | - | - |
Specs
Buy Now
More
Number Of Recliner / Rockers
2
Master Bedroom Door Style
Conventional Door
Master Bedroom Mirror Doors
Yes
Number Of Convertible / Sofa Beds
3
Sofa Material
Leather
Master Bedroom Location
Rear
Living Area Location
Front
Reclining Sofa
No
Number Of Bunk Beds
2
Number Of Sofas
2
Full Size Master Bedroom Closet
Yes
Master Bedroom Flooring Type
Vinyl
Master Bedroom Shades / Curtains
Yes
Number Of Queen Size Beds
1
Number Of Bathrooms
1
Living Room / Bedroom(s) Best Sellers
Top-rated products RV owners use to upgrade or maintain their RV.
Kitchen / Dining
| Specs | Value | Buy | Shop All | Top 5 |
|---|---|---|---|---|
| Kitchen / Living Area Flooring Type | Carpet / Vinyl | - | - | - |
| Refrigerator Power Mode | Electric | - | - | - |
| Kitchen Table Configuration | Bench Seats | - | - | - |
| Oven Depth | 21 / 533.4 in | - | - | - |
| Kitchen Location | Center | - | - | - |
| Refrigerator Size | Full-Size | - | - | - |
| Number Of Oven Burners | 3 | - | - | - |
Specs
Buy Now
More
Kitchen / Living Area Flooring Type
Carpet / Vinyl
Refrigerator Power Mode
Electric
Kitchen Table Configuration
Bench Seats
Oven Depth
21 / 533.4 in
Kitchen Location
Center
Refrigerator Size
Full-Size
Number Of Oven Burners
3
Bathroom
| Specs | Value | Buy | Shop All | Top 5 |
|---|---|---|---|---|
| Bathroom Flooring Type | Vinyl | - | - | - |
| Toilet Type | Porcelain | RV Toilet with Sprayer Attachment | Toilets | Top 5 |
| Bathroom Location | Center | - | - | - |
Specs
Buy Now
More
Bathroom Flooring Type
Vinyl
Toilet Type
Porcelain
Bathroom Location
Center
Exterior
| Specs | Value | Buy | Shop All | Top 5 |
|---|---|---|---|---|
| Awning Length | 19 ft/m | Awning Fabric Replacement | All Awnings | - |
| Number of Awnings | 1 | Motorized RV Awning Set | Shop Awnings | - |
| Leveling Jack Type | Front Power / Rear Power | - | - | - |
| Sidewall Construction | Fiberglass | - | - | - |
| Number Of Emergency Exits | 1 | - | - | - |
| Number of Doors | 2 | - | - | - |
| Door Type | Plastic / Glass | - | - | - |
| Body Material | Aluminum | - | - | - |
Specs
Buy Now
More
Awning Length
19 ft/m
Number of Awnings
1
Leveling Jack Type
Front Power / Rear Power
Sidewall Construction
Fiberglass
Number Of Emergency Exits
1
Number of Doors
2
Door Type
Plastic / Glass
Body Material
Aluminum
Exterior Best Sellers
Top-rated products RV owners use to upgrade or maintain their RV.
Options
| Specs | Value | Buy | Shop All | Top 5 |
|---|---|---|---|---|
| Screened Room | No | - | - | - |
| Cable Prewiring | Yes | - | - | - |
| Overhead Fan | Yes | Overhead Fan | - | - |
| Refrigerator | Standard | - | - | - |
| Air Conditioning Prewiring | Yes | - | - | - |
| Washer / Dryer Prewiring | Yes | - | - | - |
| Surround Sound | No | - | - | - |
| Heat Prewiring | Yes | - | - | - |
| Power Retractable Awning | Yes | - | - | - |
| Satellite Prewiring | Yes | - | - | - |
| Bunkhouse | Yes | - | - | - |
| Metallic | No | - | - | - |
| Wallpaper | Yes | - | - | - |
| Interior Wood Finish | Yes | - | - | - |
| Sliding Glass Door | No | - | - | - |
| Phone Prewiring | No | - | - | - |
| Satellite | No | - | - | - |
| Battery Power Converter | Yes | - | - | - |
| Water Heater Tank Bypass | Yes | - | - | - |
| TV Antenna Prewiring | Yes | - | - | - |
| Heated | No | - | - | - |
| Power Retractable Slideout | Yes | - | - | - |
Specs
Buy Now
More
Screened Room
No
Cable Prewiring
Yes
Overhead Fan
Yes
Refrigerator
Standard
Air Conditioning Prewiring
Yes
Washer / Dryer Prewiring
Yes
Surround Sound
No
Heat Prewiring
Yes
Power Retractable Awning
Yes
Satellite Prewiring
Yes
Bunkhouse
Yes
Metallic
No
Wallpaper
Yes
Interior Wood Finish
Yes
Sliding Glass Door
No
Phone Prewiring
No
Satellite
No
Battery Power Converter
Yes
Water Heater Tank Bypass
Yes
TV Antenna Prewiring
Yes
Heated
No
Power Retractable Slideout
Yes
Entertainment
| Specs | Value | Buy | Shop All | Top 5 |
|---|---|---|---|---|
| Number Of Discs | 1 | - | - | - |
| Speaker Location | Interior / Exterior | RecPro Exterior Speakers | - | - |
| Number Of Televisions | 1 | Insignia LED HD Alexa TV | Shop RV TV's | - |
Specs
Buy Now
More
Number Of Discs
1
Speaker Location
Interior / Exterior
Number Of Televisions
1
Entertainment Best Sellers
Top-rated products RV owners use to upgrade or maintain their RV.
Instrumentation
| Specs | Value | Buy | Shop All | Top 5 |
|---|---|---|---|---|
| Number Of Radios | 1 | - | - | - |
Specs
Buy Now
More
Number Of Radios
1
Interior
| Specs | Value | Buy | Shop All | Top 5 |
|---|---|---|---|---|
| Material | Leather | - | - | - |
Specs
Buy Now
More
Material
Leather
Quick Overview
| Specs | Value | Buy | Shop All | Top 5 |
|---|---|---|---|---|
| Parent Company | Keystone RV Inc. | - | - | - |
| Year | 2021 | - | - | - |
| Make | Keystone | - | - | - |
| Display Name | Montana High Country 377FL | - | - | - |
| Class | Fifth Wheel | - | - | - |
| Max Sleeping Count | 10 | - | - | - |
| Number of Slideouts | 4 | - | - | - |
| Introduction Year | 2020 | - | - | - |
Specs
Buy Now
More
Parent Company
Keystone RV Inc.
Year
2021
Make
Keystone
Display Name
Montana High Country 377FL
Class
Fifth Wheel
Max Sleeping Count
10
Number of Slideouts
4
Introduction Year
2020
How We Scored This RV
Our MintRV Rating analyzes over 50 specifications across 5 key dimensions. Each dimension starts at 5.0 points and adjusts based on how this RV's specs compare to others in its class. Below is exactly how we calculated each score for this fifth wheel.
Tow-Ready Score
6.0/10
Base Score
5.0
Spec-based adjustments
Based on Fifth Wheel class averages
+1.0
Final Tow-Ready Score
6.0
Living Space & Layout
5.5/10
Base Score
5.0
Spec-based adjustments
Based on Fifth Wheel class averages
+0.5
Final Living Space & Layout
5.5
Comfort & Features
6.3/10
Base Score
5.0
Spec-based adjustments
Based on Fifth Wheel class averages
+1.3
Final Comfort & Features
6.3
Storage Space
6.0/10
Base Score
5.0
Spec-based adjustments
Based on Fifth Wheel class averages
+1.0
Final Storage Space
6.0
Off-Grid & Campsites
5.3/10
Base Score
5.0
Spec-based adjustments
Based on Fifth Wheel class averages
+0.3
Final Off-Grid & Campsites
5.3
About Our Rating Methodology
MintRV Ratings are calculated using verified manufacturer specifications. We compare each RV against others in its class type and weight category. Scores are updated when new specs become available. Learn more about our methodology →
Owner Reviews
No reviews yet. Be the first to share your experience!
Frequently Asked Questions
To safely tow the 2021 Keystone RV Montana High Country 377fl, ensure your vehicle's rated tow capacity exceeds its GVWR of 16460 lbs. With a dry weight of 12985 lbs and hitch weight of 2465 lbs, most midsize trucks and SUVs can tow it comfortably with a 10-20% safety margin.
This Fifth Wheel has a dry weight of 12985 lbs and a GVWR of 16460 lbs, giving a payload capacity of 3475 lbs for gear, water, and supplies.
The approximate dimensions are length 503 in., width 96 in., and height 160 in. Always confirm clearances for garages, storage, and campsites.
The Montana High Country 377fl includes a fresh water capacity of gallons, black water tank(s), and lbs of propane capacity-ideal for off-grid weekends.
Many Montana High Country 377fl owners add a weight-distribution hitch, brake controller, leveling system, and portable generator to improve towing comfort. Solar kits, backup cameras, and upgraded tires are also popular upgrades.
With a GVWR of 16460 lbs and dry weight of 12985 lbs, the Montana High Country 377fl is light enough for smaller tow vehicles yet rugged enough for light off-road travel. Add solar, extra propane, and a generator for extended off-grid stays.
This floorplan sleeps up to 10 people comfortably - perfect for couples or small families seeking a lightweight, easy-tow Fifth Wheel.
The Montana High Country 377fl features body construction with sidewalls and axle(s). Its GVWR of 16460 lbs ensures strength without excessive towing weight.
?? Tip: Always check your vehicle's specific towing capacity in the owner's manual. Consider payload and tongue weight too!
As an Amazon Associate, we may earn from qualifying purchases. Your price stays the same.
"Our mission at Mint RV is to help people make well-informed RV buying decisions, so they can escape the stress of everyday life, reconnect with family, and create unforgettable memories in the great outdoors"