Mach Loop in Wales: photographing military jets at low level

At first there is only the wind over the grass, then someone on the slope shouts “Incoming!” Seconds later a Hawk shoots through the valley below you, so close you can make out the helmets in the cockpit, and disappears behind the next ridge. The thunder comes only afterward. The Mach Loop in Wales is one of the few places in the world where you can photograph military jets at low level at eye level or from above. This guide explains how the low-flying route works, which aircraft show up, how to plan a spotting day there and which settings get you the shots.

What the Mach Loop actually is

The name sounds like supersonic, but it has nothing to do with that. “Mach” is short for Machynlleth, a small town in mid Wales. In Welsh the route is called Dolen Mach. It refers to a network of valleys between Dolgellau in the north and Machynlleth in the south, about 13 kilometers east of the coastal town of Barmouth. The area lies on the southern edge of Eryri National Park, which many still know by its English name, Snowdonia, around the mountain massif of Cadair Idris.

Officially the Mach Loop is not an area of its own. It lies in Low Flying Area 7 (LFA7), a zone of the British low-flying system that covers practically all of Wales. The system extends over large parts of the United Kingdom, excluding, for example, big cities, civil airports and certain sensitive sites. For fixed-wing aircraft, a minimum clearance of 250 feet (about 76 meters) from the ground and obstacles normally applies there. Only specially authorized operational low-flying training may go even lower in designated training areas.

Why these valleys in particular? The slopes force the aircraft onto a line that is relatively easy to predict. Pilots practice navigating in terrain and using terrain masking here. For spotters that means: if you stand on the right slope, you see the aircraft coming, passing and turning away, at the same height or below you.

Which aircraft you see in the Mach Loop

The mix depends on which units are training at the moment. Spotter guides and the scene keep naming the same types.

• Hawk T2 and Texan T1: Both belong to the Royal Air Force’s No. 4 Flying Training School at RAF Valley on Anglesey. On the Texan, trainee jet pilots learn the basics, then move on to the BAE Systems Hawk. The Hawks are the most reliable visitors in the Loop, often in pairs or small groups. The trainer is built by BAE Systems.
• Airbus A400M: The RAF’s big transport passes astonishingly tightly through the valleys and is the most impressive subject for many. More on the type is in the type profile Airbus A400M.
• F-15E Strike Eagle: The US Air Force jets based at Lakenheath are among the best-known Mach Loop subjects.
• Eurofighter Typhoon: The RAF’s Typhoons come less often and less predictably. Everything about the type is at the Eurofighter Typhoon.
• F-35 and exotics: Occasionally an F-35, MC-130 or V-22 Osprey of the US forces turns up, along with helicopters like the Chinook.

According to Wikipedia, foreign aircraft without a British base may only use the Loop if they take part in a British exercise. Visitors from other countries are therefore real strokes of luck. If you collect military registrations, you will find the basics in the article on US military serials. How to tell transports apart is shown in the guide How to recognize military transports.

Less traffic than before

If you know old videos with dozens of passes a day, adjust your expectations. In October 2018, an incident involving a Typhoon in LFA7 caused a stir. In December 2018, a recommendation from the Ministry of Defence followed, under which fewer aircraft use the Loop. Typhoons were noticeably rarer for a long time afterward and are still considered hard to predict. The details of these restrictions have never been fully published officially.

What counts for you is the result: Spotterguide.net cites only two to five movements per day on average in good weather. Some days nothing comes, on others about twenty. The Mach Loop is therefore not a place you visit “just for a quick stop.” It rewards endurance.

Planning your spotting day

When aircraft fly

Typical is flying Monday to Friday between about 9 a.m. and 5 p.m., with most movements in the morning and early afternoon. On Fridays operations often end around midday. Weekends and British public holidays are usually quiet. Peak season is summer, on sunny days without too much wind. Low clouds quickly end low flying, because the pilots need to see the terrain.

What the official schedule tells you and what it does not

The UK Ministry of Defence publishes weekly time windows on GOV.UK for the RAF’s operational low-flying training in three training areas. One of them, LFA 7(T), is in mid Wales. A look is worthwhile, but it is no guarantee. The ministry itself points out that there is no schedule for all low-flying activity and that plans change quickly with weather and training needs. Aircraft can also fly outside the listed windows.

Flight tracker services only help to a limited extent, because many military aircraft are not fully visible. What you can still do online is explained in the article Tracking military aircraft online.

Listening to radio: tricky in the UK

In spotter guides you will find frequencies on which pilots can be heard on their way to Wales. Note, however: in the UK it is generally not allowed to listen in on radio traffic that is not intended for you. General information on the topic is in the article Listening to aviation radio: the legal situation. On the slope you usually get the advance warning the old-fashioned way anyway: someone hears the engine and shouts.

Which slope for which shot

The well-known vantage points differ mainly in perspective, light and climb. All the details on parking areas, paths and elevation gain are in the spot profile Mach Loop near Machynlleth. Here is the short version for your shot planning:

For families or rainy days, the Corris Craft Centre on the A487 offers a level alternative with a café in the valley. The perspective is less dramatic, but you do not have to climb a single meter.

Camera settings for low flying

In the Mach Loop you often have only a few seconds. The aircraft appears behind a ridge, is big in the viewfinder for a moment and is gone again. So set up your camera beforehand and leave it that way.

• Shutter speed for jets: Hawk, Typhoon and F-15E are fast and close. A short shutter speed of 1/1000 s or faster freezes them sharply. Since the background consists of slope and valley, you do not need long exposures to show motion.
• Shutter speed for propellers: With the Texan and A400M, a shutter speed that is too short ruins the propeller disc. Here you go considerably slower. How far is explained in the guide Photographing propellers. To keep the aircraft sharp anyway, you pan cleanly, see Panning technique.
• Autofocus: Continuous focus with tracking is a must. If your camera has aircraft detection, use it. Background of grass and rock can distract the focus, and a smaller focus area helps. More in the article Autofocus for aircraft.
• Burst mode: Fast bursts raise the chance of the one shot with the perfect bank angle. Plan enough storage; the tips in Memory cards for burst shooting help with that.
• Auto ISO: The light in the valleys changes with every cloud. With a fixed shutter speed and auto ISO, you stay flexible.

The right focal length

How close the aircraft come depends heavily on the slope and the type. For the Bwlch, Spotterguide.net gives examples from about 110 mm for the A400M up to 500 mm for small aircraft like the Texan and Hawk. A telephoto zoom of 100–400 mm is therefore the best all-round choice, and a 150–600 mm gives you reserve at positions farther away. Primes are impractical here because large transports burst out of the frame. Comparisons are in 100–400 mm telephoto zooms and 150–600 mm lenses, and the basics are in the guide Lens and focal length.

Shot ideas beyond the topside

The picture from above onto the wings is the Mach Loop subject par excellence. But other ideas bring variety too:

• Show the landscape: A wide frame with valley flank, lake or sheep makes clear how low the aircraft flies. That is especially striking with the A400M.
• Bank in the turn: Where the valleys bend, the jets roll into the turn. Then you see the cockpit and the upper side at the same time.
• Condensation: In humid air, vapor veils form on wings and fuselage. Tips are in the article on Condensation over the wings.
• Scene on the slope: The people with their telephoto lenses are part of the Mach Loop. A picture of the waiting group tells the story of the day.

Weather, hiking and safety

The Mach Loop is a mountain outing with a camera, not a stroll to the airport fence. The slopes are steep, often wet and uneven, and the weather in Wales changes quickly. Local guides advise full rain gear, whatever the forecast says. There are neither toilets nor refreshments on the slopes, and cell reception is weak or nonexistent in most places. Download the map for the area offline.

More tips for photographing in clouds and rain are in the guide Plane spotting in bad weather. How to get heavy lenses up the slope is shown in the article Camera backpacks for long telephoto lenses.

Respect for land and people

A large part of the terrain belongs to farmers, and the slopes are pastureland. Whether the spots stay open depends on visitors’ behavior. Open gates and trampled pastures quickly cause trouble with the owners.

• Close gates, always, even if it was open when you arrived and you are not sure.
• Stay on paths and do not climb over walls or fences.
• Take your litter with you – there are no trash cans on the slope.
• Do not launch a drone: Jets train at low altitude in the same airspace. A drone is a real collision risk here.
• Park properly and do not block driveways or passing places.

Legally, photographing from publicly accessible places is generally unproblematic in the UK. What you should know about British rules is in the article Spotting in the UK. General notes on military subjects are in the article Photographing military airfields.

Extending the trip

Because the Mach Loop is never a sure thing, it is worth combining it with reliable destinations. On the way into England lies the RAF Museum Cosford, whose spot profile you will find under RAF Museum Cosford. If you want to see active Typhoons, head to the official viewing area at RAF Coningsby. In summer, the Royal International Air Tattoo at Fairford is a highlight for military fans, and IWM Duxford shows vintage aircraft. And if you want to carry on once you are back in Germany, you will find tips under Spotting the Eurofighter in Germany. More destinations are in the list of the best spotting spots in Europe.

Conclusion

The Mach Loop is not a spot to tick off. It is a place where you wait for hours in the wind and then, for a few seconds, get a shot that is not possible at any airport in the world. Anyone who stands on the right slope early on a weekday, plans two days, is equipped for the weather and respects gates and pastures has good chances of a Hawk below them or an A400M in the turn. And even on an empty day, the landscape of Eryri remains.