top of page

Get ready for the ultimate family escape with this pristine, gently used 2021 Heartland Mallard M312—a premium travel trailer built to turn every road trip into an unforgettable adventure! Spanning 36 feet of modern luxury and designed to comfortably sleep 9+ adventurers, this lightweight heavyweight (7,012 lbs dry weight) brings the comforts of a five-star resort directly to the great outdoors.

 

  • King-Size Master Oasis: Retreat to a private front bedroom featuring a massive king bed, reading lights, and ample storage.
  • Ultimate Bunkhouse Suite: A dedicated rear bunkhouse gives the kids or guests their own zone with double-over-double bunks.
  • Massive Living Slide-Out: The deep slide opens up a sweeping floor plan with a plush sofa and a giant U-shaped dinette.
  • Gourmet Chef's Kitchen: Prep meals effortlessly with seamless Infinity edge countertops, a three-burner range, and an 8 cu. ft. fridge.
  • Epic Outdoor Kitchen: Take the party outside with a built-in exterior kitchen, perfect for tailgating and morning pancakes.
  • Power LED Awning: Create an instant patio at the touch of a button with a massive power awning and bright LED lighting.
  • All-Weather Ready: Keep exploring longer thanks to a heated, enclosed underbelly designed to protect against cold weather.
  • Pass-Through Storage: Pack everything from bikes to camp chairs in the oversized, unobstructed exterior storage bays.

___

 

Tech Specs:

  • Dry Weight (Unloaded): 7,012 lbs
  • Gross Vehicle Weight Rating (GVWR): 8,600 lbs
  • Cargo Carrying Capacity: 1,556 lbs
  • Hitch Weight: 672 lbs
  • Axles: 2 dual axles (4,400 lbs rear axle capacity)
  • Brakes: Electric drum brakes (electric brake controller on tow vehicle required)
  • Overall Length: 36 feet 0 inches
  • Width: 8 feet 0.5 inches
  • Exterior Height: 11 feet 4 inches
  • Interior Bedroom Height: 6 feet 8 inches
  • Total Living Area: 296 square feet
  • Awning Length: 16 feet
  • Fresh Water Tank: 45 gallons
  • Gray Water Tank: 40 gallons
  • Black Water Tank: 40 gallons
  • Water Heater Capacity: 6 gallons (Gas/Electric DSI)
  • Propane (LP) Tanks: 2 x 20 lbs tanks (40 lbs total capacity)
  • Air Conditioner: 13,500 BTU ducted unit (featuring 50 Amp A/C prep for a second unit)
  • Furnace Heater: 30,000 BTU output
  • Electrical Service: 30 Amp main line
  • Power Converter: 55 Amp

2021 Heartland Mallard M312

$21,995.00Price

Interested!

Approximately 90 minutes from
Minneapolis/ St. Paul/ Duluth/ Eau Claire

Location icon

Questions?

Contact us today-we're here to help.

           © 2026 Siren Camper Corral

Terms and Conditions     Privacy Policy

  • Facebook Social Icon
Hours of Operation:
Tue-Sat, 10AM-4PM

 
bottom of page