Where specifically: South Wales, the peninsula that runs West of Swansea, with the Loughor river along the Northern edge.
What am I doing here? The Gower peninsula is worth a visit, whether mountain biking or not. It was Britain’s first SSSI, and contains in its small area a hugely varied selection of terrain and wildlife habitats, including some of the finest beaches in the UK. There are upland moors, woods, cliffs, beaches, salt flats, sand dunes and plenty of others as well. Swansea itself is not far away for nightlife, bike shops and the like, the Celtic Trail National Cycle route crosses the peninsula, and the coastline has more choughs, cormorants, seals and other wildlife than you can shake a stick at, even if you’re well practised in wildlife stick shaking.
So which bits should I ride? The Gower is a relatively small area, and so it’s quite possible to do a route taking in the majority of good spots. See the other Gower post, which covers them in more detail. The singletrack along the side of Rhossilli Down is excellent, as is the obvious and fun bridleway along the top of Cefn Bryn. There are plenty of other good sections, but a quick look at a map, a guide, or the other post on here should provide plenty of material.
I miss trail centres. The incredible trail centre riding of the Afan Forest Park is not far away up the Neath valley. Margam Park reportedly has a new red graded trail as well (though I’ve yet to ride it). Slightly further afield the quiet and beautifully designed trails in Brechfa Forest are within striking distance, and if you’re not from the area then the trip back along the M4 takes you past Cwmcarn, the Forest of Dean, and all sorts of varied riding.
My bike’s broken. In Swansea there’s Wheelies, the Urban Cyclery and Schmoos. Llanelli doubtless has some of its own bike shops. Halfords, for cheap parts and basic repair, is everywhere.
Where can I find out more? See the other post where I’ve described some of the sections of bridleway in more detail. I’d recommend the Vertebrate Publishing book on Mountain Biking in Wales for a route taking in the highlights of the Gower. Mountain biking wales, as always, has a good selection.