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Used 2025 Keystone Alpine 3700FL

Fifth Wheel|Elizabethtown, PA| Stock# 358740

$72,999

$488/mo.

Retail: $79,999

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Keystone Alpine 3700FL highlights

  • Front Living Area
  • Dual Tri-Fold Sofas
  • Theater Seating
  • King Bed Suite
  • Five Slide-Outs

The Keystone Alpine 3700FL is a luxury fifth wheel designed to deliver residential comfort, upscale finishes, and spacious living for extended travel. The front living area features opposing tri-fold sofa sleepers, theater seating, and a large entertainment center, creating an inviting space for relaxing or entertaining guests. The central kitchen is fully equipped with a residential refrigerator with ice maker, convection microwave, three-burner cooktop, solid-surface countertops, ample pantry storage, and a free-standing dinette, providing everything needed for comfortable meal preparation and dining on the road.

In the rear, the private master suite offers a king-size bed, wardrobe storage, dresser space, and washer/dryer prep for added convenience during longer stays. The nearby bathroom includes modern amenities with a spacious shower, vanity, and additional storage. Outside, dual power awnings extend your living space at the campsite, while the five slide-outs maximize interior room and comfort. Built with Keystone’s premium construction and designed for luxury travel, the Alpine 3700FL offers the perfect combination of space, style, and functionality for full-time living or extended adventures.

Overview

Keystone Alpine 3700FL highlights

  • Front Living Area
  • Dual Tri-Fold Sofas
  • Theater Seating
  • King Bed Suite
  • Five Slide-Outs

The Keystone Alpine 3700FL is a luxury fifth wheel designed to deliver residential comfort, upscale finishes, and spacious living for extended travel. The front living area features opposing tri-fold sofa sleepers, theater seating, and a large entertainment center, creating an inviting space for relaxing or entertaining guests. The central kitchen is fully equipped with a residential refrigerator with ice maker, convection microwave, three-burner cooktop, solid-surface countertops, ample pantry storage, and a free-standing dinette, providing everything needed for comfortable meal preparation and dining on the road.

In the rear, the private master suite offers a king-size bed, wardrobe storage, dresser space, and washer/dryer prep for added convenience during longer stays. The nearby bathroom includes modern amenities with a spacious shower, vanity, and additional storage. Outside, dual power awnings extend your living space at the campsite, while the five slide-outs maximize interior room and comfort. Built with Keystone’s premium construction and designed for luxury travel, the Alpine 3700FL offers the perfect combination of space, style, and functionality for full-time living or extended adventures.

Specifications

Specifications

RV Details

  • Sleeps6
  • Slides5
  • Length41 ft. 5 in.
  • Width8 ft. 4 in.
  • Height13 ft. 4 in.
  • Dry Weight14111 lbs.
  • Hitch Weight3080 lbs.
  • GVWR17090 lbs.
  • VIN4YDFALU27SE780182

Tanks & HVAC

  • Fresh Water1 Tank(s) | 75 gal.
  • Black Water1 Tank(s) | 78 gal.
  • Gray Water1 Tank(s) | 78 gal.
  • Propane2 Tank(s) |
  • HeatAutomatic

Appliances

  • Awnings2 | 28 ft. Powered Retractable Awning
  • BedsKing (x1), Convertible (x2)
  • ShowerPlastic / Glass
  • RefrigeratorFull-Size
  • Cooktops | Microwave3 | Yes
  • Washer/Dryer PreppedYes
  • Axles | Tire SizeST235/80 R16G
All Amenities

All Amenities

King bed
Convertible beds (x2)
Convection cooking
Cooktop burners (3)
Washer/dryer prep
Center kitchen
Front living area
Rear/center bath
Center bedroom
Full-size electric refrigerator with ice maker
Free-standing dinette
Theater seating
Tri-fold sofa sleepers
28 ft. powered retractable awning (x2)
Stackable washer/dryer prep
Smart HDTV
Pantry
Solid step entry

Can you tow this RV?

Understanding your vehicle's towing capacity rating is critical to choosing the right RV for you and your family. Towing your next RV safely down the road will depend on having the right tow vehicle and RV combination. Use our handy towing guide below to help find your vehicle's towing capacity and filter our RV inventory down to RVs you can tow. View Tow Guide >

Attention: Your vehicle's max towing capacity includes passenger weight, added accessories, any current liquids in tanks, and any cargo you've added such as food, clothes, chairs, grills, games, tools, etc.. For purposes of RVs I can Tow, we've allowed 1000 lbs for RVs over 8000 lbs, 750 lbs for RVs under 8000 lbs, and 500 lbs for RVs under 5000 lbs for average Cargo Weight. Always confirm your specific tow vehicles towing capacity directly from your vehicle's manufacturer before purchasing or towing an RV. You are responsible for the decision to operate your vehicle and any RV you may tow. If your specific vehicle is not listed, please contact us for assistance.

General RV works hard to ensure the accuracy of all its listings however we are not responsible for any misprints, typos, or errors found in our website pages. Manufacturer-provided pictures, specifications and features may be used as needed. Inventory shown may be only a partial listing of the entire inventory. Please contact us at 888-436-7578 for availability as our inventory changes rapidly.

*All RV prices exclude tax, title, registration and fees, including documentary service fees. All payments are with approved credit through dealer lending source. Advertised monthly payment is based on 20% cash down, plus tax, title, registration and fees, at 7.99% APR for 96 months on finance amounts under $10K, at 7.99% APR for 144 months on finance amounts from $10K to $25K, at 7.99% APR for 180 months on finance amounts from $25K to $50K, and at 7.99% APR for 240 months on amounts over $50K. $79 monthly payment based on purchase price of $9,999 with 20% down at 8.24% APR for 218 months. $439 monthly payment based on purchase price of $69,995 with 20% down, at 6.49% APR for 240 months. For select models only. Rate and payments are subject to change at any time. Conditions apply. See dealer for details.