The pass, and why it is the famous one
Bwlch Oerddrws is a mountain pass on the A470 between Dinas Mawddwy and Cross Foxes, and the hillside above it is the most photographed spot on the Loop. MachLoop.co.uk calls it the most visited viewpoint in the entire Loop, places it five miles east of Dolgellau and gives the position as 52.7350°N, 3.7750°W; the Old Vicarage puts it two minutes by car from Cross Foxes.
“Bwlch” is the Welsh word for a pass, which is why so many Welsh mountain roads carry one in the name; our Welsh language page has more. It sits round the corner from the Tal-y-llyn side of the Loop: Dinas Mawddwy, at the eastern foot of the pass, is about 10 miles from Machynlleth. Most visitors come over the A487 to Cross Foxes and then east, or up the A470 by way of Cemmaes and Mallwyd.
Laybys, and the reason for an early alarm
There is no car park at the Bwlch, only laybys on the A470, and the two main specialist guides disagree on how many cars they hold. MachLoop.co.uk gives approximately 20 vehicles and adds a practical instruction — be parked by 08:30 on busy days. Shootsmart.co.uk is more conservative, at approximately 10 to 12 maximum. No charge is advertised.
Take the smaller figure as your planning assumption. Being the best-known position on the Loop, this is the one that fills first, and a mid-morning arrival may find nothing. Move on rather than squeezing in: MachLoop.co.uk is unambiguous — do not block farm gates, passing places or private driveways, and do not park on verges in a way that blocks visibility or churns the ground, because access depends entirely on the goodwill of private landowners. The A470 crosses this pass with gradients and bends, and a vehicle protruding into the carriageway is a hazard to traffic that cannot see it coming.
Two ledges, and how much climbing each one costs
The Bwlch is unusual in offering more than one viewing position at different heights, which is much of why it suits a mixed party. MachLoop.co.uk gives the walk as under half a mile from the car, with roughly 400 feet of ascent to the top ledge and roughly 200 feet to the middle one, graded easy to moderate; the Minffordd Hotel gives 0.40 miles and 423 feet, or 0.29 miles and 236 feet.
Times vary. Scramble’s LFA7 guide says 20 to 30 minutes uphill from the A470 parking; shootsmart.co.uk says 30 to 50 minutes and calls it the second hardest climb on the Loop; MachLoop.co.uk puts the middle ledge at about 20 minutes at a relaxed pace. The honest reading is that the middle ledge is within reach of most reasonably fit people and the top ledge is a proper pull.
MachLoop.co.uk describes the ground as uneven hillside paths requiring boots even in dry conditions, and that is the sentence to remember. There is a discernible line to follow, more than some positions offer, but it is no surfaced path, there are no steps or handrails, and it is not suitable for wheelchairs or pushchairs. The top ledge gives the classic look-down photographs; the middle one is the alternative when it is crowded.
What you see, and which way they come
From the ledges you look down into the pass, the road threading below and the hills of southern Eryri around you. This is the archetypal Mach Loop view: aircraft below the observer, banking through a narrow valley, ground behind them rather than sky. The minimum height for low flying in the system is 250 feet, which is why the perspective works at all.
On the direction they arrive from, the specialists differ, probably according to which ledge you are on and which way you face. MachLoop.co.uk says left to right when facing into the valley; shootsmart.co.uk says right to left, with head-on views and warning of around 10 to 20 seconds, a long time here; the Old Vicarage also has them approaching from the right. Work out your orientation and watch both ways.
Light favours the morning: MachLoop.co.uk notes that morning light falls across the upper surfaces, which is what a topside position wants, while shootsmart.co.uk rates it good all day. The Bwlch in the morning and Cad West in the afternoon is the standard two-position day — see the photography page.
Who the Bwlch suits
It suits a first-timer better than anywhere else on the hillside: MachLoop.co.uk’s beginners’ guide recommends it for most first visits, because the path is clear, the parking is close, the view down into the valley is what you imagine, and the middle ledge needs no specialist experience. It suits a mixed-ability group, the middle ledge giving slower members somewhere real to sit. It does not suit anyone who cannot manage rough uphill ground, nor a late arrival. The flat alternative is the Corris Craft Centre, which MachLoop.co.uk calls the only fully flat, no-climbing option on the Loop. Bluebell, further east on the same road, is the opposite: three parking spaces and the steepest ground of the lot.
The limitations nobody can design around
Being the best-known viewpoint does not make it a reliable one. There is no published day-to-day schedule for military low flying in LFA7 and no way to look up when jets will pass. MachLoop.co.uk gives common flying hours as roughly 09:00 to 17:00 Monday to Friday and then states, without qualification, that there is no schedule, ever — blank days happen through cancelled training, weather and bank holidays. Crews also have several ways round the valley system, so an active day elsewhere in the Loop can still mean an empty sky above this pass.
MachLoop.co.uk’s most useful advice is about time rather than place: allow at least one full day and preferably more, because people with a single day often see nothing while those who allow two almost always see something on the second. The Old Vicarage at Corris logged an average of 3.5 passes a weekday in a June 2024 sample, 21 on the best day.
Then there is the pass itself: high, open and windy, no shelter on either ledge, no toilets, no water, no food, patchy phone signal, and low cloud that takes the view and the flying together. Read the weather page, when they fly for what is honestly knowable, and planning a Loop day for a day when nothing comes. The Countryside Code as Eryri National Park publishes it applies: gates as you found them, dogs on a lead near livestock, litter home.
Day trips