It's difficult to give a just introduction to a route of this calibre, and even to simply say that Diedre Sud is nothing short of remarkable seems to be unforgivably weak. Just know this, it ascends the entire West Face of the already magnificent Mowing Word, is very steep and satisfyingly exhilarating, has many sublime positions, and might well be the best route of its grade anywhere in Britain – oh what the hell, the world.
Mowing Word lies around midway between Broad Haven Beach and Stackpole Quay, but is best reached from the beach in the south. When approaching from Carmarthen (SN 405 196) take the A40 Truck Road signposted for Saint Clears (SN 274 160). At the Saint Clears roundabout, take the A477 Trunk Road towards Pembroke Dock (SM 969 036). Before reaching Pembroke Dock, turn left onto the A4075 (SN 019 027) to Pembroke (SM 989 012). In Pembroke, drive straight over the first small roundabout you reach and drive along the A4139 a few hundred metres and turn left and take the B4319 south towards Castlemartin (SR 915 983). Around 2.5km after Saint Petrox (SR 971 975), take a left hand turn (SR 965 964) signposting Bosherston (SR 965 9470). Drive through Bosherston (or stop for a cup of tea at Mrs Weston's Olde Worlde Café) to the Broad Haven Car Park (SR 975 939).
Leave the car park and cross Broad Haven Beach, from here follow a path along a fence that leads to Saddle Bay (SR 983 942). From Saddle Bay follow the coastal path past Raming Hole (SR987944) to a small sandy bay. From here you will be able to see the narrow headland of Mowing Word (SR991942) protruding far into the sea. The coastal path will now take you along the cliff tops to said headland where you will be provided with a choice of stakes for abseiling and belaying. Choose the small and slightly rusty 'double' stake.
At low tide it is possible to reach the base of the crag on foot by abseiling in at Gun Cliff and strolling across the beach. The final push to the start of the route will require a short sea level traverse across the Chimes of Freedom Area.
Anchor your static rope to the small 'double' stake just above the corner that gives the route. Abseil in and establish a hanging belay on ledges just above the high tide mark.
Pitch 1 (20m): The only way is up! Follow the steep corner crack on reassuring holds to a series of ledges at around 15 metres. Continue easily up these for another 5 metres or so to a large ledge on the right. Belay here, or climb straight through. If climbing in choppy seas your second won't thank you for climbing on.
Pitch 2 (20m): This pitch gives the crux of the climb, which comes in at a surprisingly reasonable 4a. Follow the natural line of the corner to the overhang above, but before reaching it take the large crack to your left. Follow the crack around the overhang to the top and belay your second from the stake used for your abseil. Bring your second up and high fives all round – you've just completed a UK classic!
The route is either one long pitch or two short ones - so equip yourself accordingly. The route will take an absolute ton of gear, so if you like to place a lot, take as much as you can carry. Unlike many of Pembroke's climbs, Diedre Sud will take a mixture of small and large gear so be sure to have a good mix. Cams become very useful higher up. You will also need to make allowances for a hanging belay at the start of the route. Double ropes are essential for avoiding rope drag. You should also carry an abseil rope to safely access to the base of the crag, along with a set of prussiks (or equivalent) to allow for self rescue should the need arise.
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OS 1:25k Explorer Series OL 36 South Pembrokeshire/De Sir Benfro
OS 1:50k Landranger Series 158 Tenby & Pembroke / Dinbych-y-pysgod & Penfro
OS Road Map 6 Wales/Cymru & West Midlands
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