Photo by Olgierd Rudak via Wikimedia Commons (https://commons.wikimedia.org/wiki/File:Airstream_travel_trailer,_Lakolk_beach,_R%C3%B8m%C3%B8_island,_Denmark_(2024-08-19).jpg) (CC BY-SA 4.0)
2025 Heartland Mallard M300
by Heartland
Full Specifications
General Info
| Manufacturer | Heartland |
| Country of Origin | USA |
| Year | 2025 |
| Category | Travel Trailer |
| Subcategory | — |
Dimensions & Weight
| Length | 37.5 ft |
| Width | 8.5 ft |
| Height | 10.5 ft |
| Dry Weight | 3,600 lbs |
| GVWR | 7,600 lbs |
| Hitch Weight | 540 lbs |
| Cargo Capacity | 4,000 lbs |
Engine & Chassis
| Fuel Type | N/A |
| Engine | — |
| Chassis | — |
| Horsepower | — |
| Fuel Capacity | — |
Living & Off-Grid
| Sleeping Capacity | 9 |
| Slide-Outs | 3 |
| Awning Length | 18 ft |
| A/C | 13,500 BTU |
| Furnace | 25,000 BTU |
| Fridge | 10 cu ft residential |
| Fresh Water | 32 gal |
| Gray Water | 58 gal |
| Black Water | 27 gal |
| Solar | 300 W |
| Battery | 50 Ah |
| Inverter | 500 W |
About the 2025 Heartland Mallard M300
Practical, spacious, and packed with features, the 2025 2025 Heartland Mallard M300 by Heartland is a travel trailer that checks boxes across the board. It is the type of RV that makes camping feel less like roughing it and more like relocating.
With an overall length of 37.5 feet, a width of 8.5 feet and with a height of 10.5 feet, the 2025 Heartland Mallard M300 has a dry weight of 3,600 lbs, and a gross vehicle weight rating of 7,600 pounds, leaving you 4,000 lbs of cargo carrying capacity. With 3 slide-outs, the interior opens up considerably at camp, creating a spacious feel.
With capacity for 9 people to sleep, this is a true family hauler. The 2025 Heartland Mallard M300 arranges its sleeping areas across multiple zones, so parents can enjoy separation from the kids at bedtime while everyone shares the common living space during waking hours.
The tank configuration includes a 32-gallon fresh water tank, 58 gallons of gray water holding, a 27-gallon black water tank. For electrical needs, the unit provides 300-watt solar charging capability, 50 amp-hours of battery storage, a 500-watt inverter for household AC power. 13,500 BTU of air conditioning handles warm-weather comfort, while a 25,000 BTU furnace ensures warmth during cold nights. Food storage is handled by a 10 cu ft residential fridge. A 18.0-foot awning extends your living space outdoors, providing shade and shelter.
Towing the 3,600-pound 2025 Heartland Mallard M300 demands adequate tow capacity from your truck. The hitch weight comes in at 540 lbs, an important factor for matching to your truck. The fully loaded GVWR of 7,600 lbs is the number to match against your tow vehicle's rating.
At $78,000, this model offers a balanced combination of features and value in the Travel Trailer category, hitting the sweet spot that most buyers are shopping in. Large families and groups will find the 2025 Heartland Mallard M300 particularly appealing, with enough sleeping positions to handle a full crew without anyone being relegated to a tent or air mattress.
Whether you are planning weekend getaways or extended road trips, the 2025 2025 Heartland Mallard M300 from Heartland provides a well-rounded package that deserves a spot on your shortlist. Take the time to walk through one at your nearest dealer and see how it fits your travel vision.
The 2025 Heartland Mallard M300 is a versatile travel trailer that delivers spacious camping comfort at a fraction of the cost of a motorhome.
Weighing just 3,600 lbs dry with a GVWR of 7,600 lbs, the 2025 Heartland Mallard M300 is towable by many half-ton trucks and large SUVs. Inside, the 37.5-foot layout includes 3 slide-out(s), a U-shaped dinette, and entertainment center with TV prep.
The 2025 Heartland Mallard M300 comes standard with stabilizer jacks, exterior utility center, and battery disconnect. At $78,000, it represents one of the best values in its class for families entering the RV lifestyle.