Fire Mountain Sierra 3 Burner Review UK 2026
Quick verdict
Score: 9.5/10
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 (3-burner) for outdoor cooking.
The Fire Mountain Sierra 3 Burner is a built-in, gas BBQ with a 3-burner layout, a lid thermometer, and cast iron grates, designed for an outdoor garden or patio setup with a 50 x 42 cm cooking area. It suits people who want a built-in look, steady cooking surfaces, and basic temperature feedback. This gas barbecue appeal is mainly practical for everyday grilling in a moderate space, and it does not specify additional add-ons such as side burners, heating zones, or detailed material grades, so expectations should remain straightforward. For the Fire Mountain gas BBQ, fit and installation checks are needed before purchase.
Key specifications
| Feature | Detail Notes |
|---|---|
| Burners | 3 Built-in |
| Thermometer | Lid Temperature feedback |
| Grates | Cast iron Cooking surface |
| Area | 50 x 42cm Outdoor use |
Pros
- 3-burner
- Built-in
- Lid thermometer, 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
The gas barbecue is a built-in gas BBQ designed for outdoor garden and patio cooking, intended to sit within a larger outdoor kitchen setup rather than as a standalone unit. Its stainless steel body is made to integrate into both modern and traditional outdoor kitchen layouts, particularly where a fixed counter space is planned. The cooking area measures 50 x 42cm, positioning it for regular family meals rather than large gatherings. A lid thermometer is included to help judge grilling conditions without opening the lid frequently. The cooking grates are made from cast iron, and the product description does not provide details on maintenance requirements.
Size and Seating
With a cooking area measuring 50 x 42cm, the Fire Mountain is geared towards everyday grilling and smaller meal plans rather than very large batch cooking. It suits most casual patio use where cooking is done in smaller portions at a time, such as burgers, sausages and vegetables. The three burners divide cooking into separate zones, so different foods can be cooked at different rates. Seating is not determined by the unit itself and depends on outdoor space and table layout. For bigger groups, it may require multiple cooking rounds instead of one continuous cook.
Materials and Build
The gas barbecue uses a stainless steel body paired with cast iron grill grates, a practical combination for outdoor cooking as the grates retain heat while the stainless steel housing is designed to resist day-to-day weather exposure. The cast iron grates create stable cooking surfaces across the 50 x 42cm cooking area, and they are described as tolerating repeated heating cycles better than lighter metals. Stainless steel supports the garden-facing design, though it can show marks if cleaned roughly. A built-in thermometer is included in the lid.
Comfort and Features
Comfort and Features on the Fire Mountain Sierra 3 Burner focus on day-to-day usability for outdoor cooking. The built-in design suits established garden patio setups, rather than frequent moving. A built-in thermometer on the lid allows users to monitor heat without repeatedly lifting the lid, which can slow cooking. The grilling surface is 50 x 42cm, making food planning straightforward for small groups. Grates provide solid support for pans and trays, though their weight can make deep cleaning slower. Controls and access are practical.
Who Is This For?
Who is the Fire Mountain for? It is intended for people who want a built-in outdoor gas barbecue for a garden or patio, offering a 50 x 42 cm cooking area. With three burners and a thermometer, it suits households that cook for several people and prefer temperature checking rather than guessing. Shoppers with limited outdoor space may find the built-in layout and 50 x 42 cm cooking area restrictive.
Where to Buy in the UK
The gas barbecue's Sierra 3 Burner Gas BBQ is a three-burner gas model intended for outdoor use in a garden or on a patio. Before purchase, the key measurements to check are that it is designed for a 50 x 42 cm cooking area. Where to buy usually depends on The Fire Mountain's UK retail routes, which may include specialist BBQ retailers and online outlets. A buyer should compare listing details that match the stainless steel build, cast iron grates, and built-in thermometer, because dimensions and install type affect fit. If a store does not clearly confirm those specifications, it should be treated cautiously.
Frequently Asked Questions
Is the gas barbecue worth it?
For regular garden barbecuing for family and guests, this gas barbecue (a 3-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 Fire Mountain have?
The Fire Mountain Sierra 3 Burner is a 3-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 gas barbecue use?
This gas barbecue 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.
Is the Fire Mountain portable?
The gas barbecue is a built-in model. It's built to live in the garden rather than travel, usually with wheels so you can reposition it on the patio. Check the footprint against your space, and plan to cover or store it over winter to prevent rust.
What features does the Fire Mountain have?
The gas barbecue offers lid thermometer, cast iron grates. A lid thermometer lets you cook with the lid down, which is essential for anything thicker than a burger. 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 Sierra 3 Burner?
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.