In reply to Rob Davies:
Yeah, El Tranco is what i was refering to in my other post, forgot the name. It's there that you'll find the crag; Placas Del Halcon, the main one in El Tranco area. El Tranco actually gets it's name from Camping El Tranco which is behind the town, loads of signs to it.
I'm pretty sure though that the approach to El Yelmo from El Tranco is far far longer than from Canto Cochino.
I'd recommend just going straight to Canto Cochino, find the refuge or a decent bivvy and climb in all it's surrounding crags; La Tortuga, El Yelmo etc. There's loads of good natural bivvies in the area of El Yelmo.