Fire Mountain Sierra 6 Burner Review UK 2026
Quick verdict
Score: 9.3/10
Best for: Regular garden barbecuing for family and guests
Not for: Anyone short on storage space, or wanting charcoal flavour from a pure gas model
Bottom line: A practical gas barbecue (6-burner) for outdoor cooking.
Often, the Fire Mountain Sierra 6 Burner is a solid choice for people who want a larger gas BBQ for cooking multiple dishes at once, thanks to its 6 burners and a stated 72 x 42 cm cooking area. Cast iron grates are designed to support even, steady grilling.
Key specifications
| Feature | Detail Notes |
|---|---|
| Burners | 6 Gas |
| Grates | Cast iron Material stated |
| Cooking area | 72 x 42 cm XL per title |
Pros
- 6-burner
- Cast iron grates
- Instant heat and quick cleanup versus charcoal
Cons
- Gas bottle, regulator and hose are usually sold separately
- Needs covering or storing over winter to prevent rust
- Check the assembled size suits your space
Style and Setting
With the cooking capacity and grate material already set out in the key specifications, the next factor for this gas barbecue is how it fits different outdoor spaces and how that affects day-to-day use. The stated cooking area is 72 x 42cm, so it suits family-sized meals and wider cooking plans. Its XL outdoor format typically works best on garden patios, where there is enough room for movement around the grill. Cast iron grates typically feel substantial, yet they can demand careful cleaning to prevent residue build-up. In tighter balconies or narrow paths, placement and workflow may become awkward (not stated).
Size and Seating
The Fire Mountain is designed for larger outdoor cooking sessions, with a stated cooking area of 72 x 42cm (X-Large). Using six burners, it enables multiple items to be cooked at separate heat zones, which suits family-style meals and batch cooking. Seating capacity depends on the user's layout, as no specific table space or bench dimensions are provided. The grill's wide footprint can also demand additional patio clearance, so buyers should measure the available space before purchase.
Materials and Build
Materials and build matter because a barbecue's heat performance and long-term maintenance depend on what parts are made and how they are assembled. The gas barbecue is described as an XL outdoor BBQ with a 72 x 42cm cooking area, using stainless steel as the main body material, and cast iron grill grates. Stainless steel typically resists rust better, so daily weather exposure is less of a worry. Cast iron holds heat well, but it is heavier and requires proper cleaning to prevent grease and residue build-up. Assembly relies on secure fastening, because loose parts can wear faster.
Comfort and Features
Comfort and features centre on how straightforward the Fire Mountain is to use day-to-day, and how the cooking layout supports family-sized meals. The XL cooking area is 72 x 42cm, making it easier to grill multiple items together. Cast iron grates are designed to make steady contact with the heat, and six burners allow cooking zones so different timings can be managed at the same time, such as larger cuts on one side and smaller items on the other. The cooking layout can feel busy in smaller outdoor spaces, and careful setup and spacing are important.
Who Is This For?
The gas barbecue suits families and groups who want to cook several items at once, rather than just a couple of portions. It is aimed at UK households with garden or patio space that can accommodate a large 72 x 42cm cooking area, where multiple trays, skewers, or sides can be cooked alongside mains. The six-burner layout is designed to support cooking by method. Cast iron grill grates are included to support steady searing. People cooking for small households may find the cooking area and burner layout unnecessary.
Where to Buy in the UK
In the UK, the Fire Mountain Sierra 6 Burner is typically listed by UK-focused garden and BBQ retailers, and it may also appear through larger online marketplaces that carry The Fire Mountain outdoor cooking equipment. Shoppers often start by checking local store listings, since the 72 x 42cm cooking area size and the grill grates material can be presented differently across sellers. When a retailer lists "Sierra 6 Burner", buyers should confirm the gas, six-burner model and verify the grille specification shown in the product listing. For online orders, delivery options and returns terms should be reviewed as "not stated" details can vary by seller.
Frequently Asked Questions
Is the gas barbecue worth it?
For regular garden barbecuing for family and guests, the Fire Mountain (a 6-burner gas BBQ) does the job. Whether it suits you depends on how many you cook for, your space and how often you grill. Check the current Amazon UK price, as barbecues are heavily discounted outside the summer peak.
How many burners does the gas barbecue have?
This gas barbecue is a 6-burner model. As a rough guide, 2 burners suit couples and small families, 3 to 4 burners suit most households, and 5 or more suit regular entertaining. More burners also mean better zone control - you can run one side hot for searing and leave another cooler for indirect cooking, which is how you avoid burnt outsides and raw middles.
What fuel does the Fire Mountain use?
The Fire Mountain Sierra 6 Burner runs on gas (LPG). You'll need a gas bottle - typically patio gas or propane - plus the correct regulator and hose, and these are usually sold separately, so factor that into the cost. Gas gives instant heat, precise control and quick cleanup compared with charcoal.
What features does the gas barbecue have?
This gas barbecue offers cast iron grates. Cast iron grates hold heat well and give better sear marks than thin steel. Match the features to how you actually cook.
How do you look after the Fire Mountain?
Brush the grates while still warm after each cook, and empty the grease tray regularly - a build-up is the most common cause of flare-ups. Give the burners an occasional check for blockages. Crucially, use a cover and store it somewhere dry over winter, as rust is what kills most gas barbecues long before the burners fail. Always turn the gas off at the bottle after use.