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New 2026 Keystone Alpine 3820FK

Cibolo, TXFun Town RVDirections

Sleeps6
Length41' 11"
Dry weight14,335 lb
Slide-outs4

About this RV

Keystone RV Alpine fifth wheel 3820FK highlights: • Colossal Storage under Rear Bath • Walk-In Shower • Front Kitchen • Middle Living Area • Front Windshield Design This fifth wheel is decked out in luxuries! The full rear bathroom has a walk-in shower to freshen up in each morning, a dual sink vanity for two to get ready at once, plus washer and dryer prep. You will enjoy a good night's rest on the king bed slide inside the private bedroom and others can sleep on the opposing tri-fold sofa sleeper slides in the living room. There is also a theater seating here, along with a fireplace and 50" LED TV for movie nights. The front kitchen is where it's really at in this fifth wheel; ample counter space, a bar top with stools, pull-out drawers, plus a pantry and closet for even more storage! Luxury is not an option, it is a standard with each one of these Keystone RV Alpine fifth wheels! A 8' 4" wide body construction will create an open, residential feeling, and cutting-edge technology will provide a hassle-free camping experience.

Specifications as listed by the dealer

Type
Fifth wheel
Condition
New
Year
2026
Make
Keystone
Model
Alpine 3820FK
Stock number
229527
VIN
4YDFALU29TE780217
Hitch weight
2,835 lb
Sleeps
6
Slides
4
Length
41 ft 11 in
Ext Width
8 ft 4 in
Ext Height
13 ft 4 in
Interior Color
DOVETAIL
Exterior Color
WHITE FOG
Dry Weight
14,335 lbs
Cargo Capacity
3,665 lbs
Fresh Water Capacity
75 gals
Grey Water Capacity
78 gals
Black Water Capacity
44 gals
Tire Size
215/75R17.5H
Furnace BTU
35,000 btu
Available Beds
King
Refrigerator Type
Residential with Ice Maker
Refrigerator Size
18 cu ft
Convection Cooking
Yes
Cooktop Burners
3
Number of Awnings
2
Axle Weight
7,000 lbs
LP Tank Capacity
30 lbs
Water Heater Type
On Demand
AC BTU
46,500 btu
TV Info
LR 50" LED TV
Awning Info
14' Carefree with Adjustable Arms
Axle Count
2
Washer/Dryer Available
Yes
Number of LP Tanks
2
Shower Type
Walk-In Shower
Electrical Service
50 amp

Features

  • 12" I-Beam frame and 100" wide-body construction
  • Road Armor™ shock absorbing hitch pin
  • Hitch Vision™ w/ LED lighting (model specific)
  • Laminated sidewalls w/ double-welded aluminum construction
  • Large, tinted safety glass windows (80% tint)
  • Dual pane windows (optional)
  • Slide Awnings: Triples (optional)
  • Slide Awnings: Quads and Above (optional, model specific)
  • Painted fiberglass cap w/ patented Key Shield™ protection and LED lighting
  • Radius roof w/ 5" pre-engineered roof trusses and walkable rafters
  • 1-piece Alpha Super Flex TPO membrane
  • Exterior ladder
  • Summit slide-rooms w/ 6'10" interior height and hydraulic selector valves for slide outs
  • Heated and enclosed underbelly w/ 1-piece polypropylene
  • Dexter® heavy duty 8,000 lb. Axles (model specific)
  • Dexter® heavy duty 7,000 lb. axles w/ Nev-R-Adjust brakes (model specific)
  • Dexter® heavy duty 7,000 lb. Axles (model specific)
  • Road Armor™ Shock Absorbing Suspension (model specific)
  • TCS Suspension w/ABS brakes
  • Lippert TPMS Prep (model specific)
  • Lippert TPMS Monitoring system
  • Saliun G-rated tires (model specific)
  • Cooper H-rated tires
  • Electric gate Valves
  • Titan: One touch, 6-point hydraulic level up system
  • Super size, 6'4" tall, 30" wide entry door
  • Lippert Strut Assisted SolidStep®
  • 200 Cu. Ft. heated basement storage and class A style, dual latch slam doors
  • Back-up and side camera prep
  • Battery quick-disconnect
  • Easy access Nautilus™ water works center - fully enclosed and heated
  • Canister style water filtration
  • Oversized 73" sewer hose carrier
  • Generator prep (optional)
  • 5,550 watt Cummins Onan LP gas generator (optional)
  • 75 gal. fresh water, 83 gal. gray water, 49 gal. black water tanks
  • Outdoor kitchen/entertainment (model specific)
  • 50 AMP service w/ electric power-cord reel
  • Outside shower w/ hot and cold water
  • Carefree power awning w/ adjustable arms

Questions about this 2026 Keystone Alpine 3820FK

How many 2026 Alpine 3820FKs are on RV Shift?

2, all new and all at Fun Town RV. All 2 are $78,301.

From RV Shift’s listings, updated nightly

Is it still for sale?

Fun Town RV’s website listed it for sale on November 5, 2026. RV Shift checks dealers’ websites about once a day, so ask the dealer to be sure.

What does it take to tow it?

RV Finder’s estimate: it needs a vehicle rated to tow about 15,600 lb, with a fifth-wheel hitch. That is its 14,335 lb dry weight plus 1,200 lb for water and gear, rounded up to the next 100 lb. RV Finder shows whether it is within your vehicle’s published rating, from the maker’s own towing guide, and checks tongue weight and payload too. Confirm your numbers in your owner’s manual and on the sticker in the driver’s door jamb. Check it in RV Finder

How do I ask the dealer about it?

Use the Check availability form on this page. Your message comes to RV Shift and we pass it to Fun Town RV. You can also call Fun Town RV at (833) 386-8696.

Listing and photos: Fun Town RV. Details come from the dealership and can change; confirm them before you buy.

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