I’ve ridden over castell de castells a little further into the mountains. Unbelievable steep climbs, but some fast and loose rocky descents. I’ve also ridden over the other ridge by Guadalest, there is a proper mountain bike loop. It officially starts in Sella on the other side. I started it half way round in Benifato myself. Again some steep climbs, on and off road. Awesome descent on the way down to Sella.
I hear there are a couple of new bike shops open in Altea or L’Alfas de Pi, sorry can’t remember which one. Pretty friendly by all accounts. I friend of a friend was out there recently, he popped in to ask about local trails and they ended up taking him out for a few rides.
Not sure how far away it is from Pollop as I’ve not been yet. But there’s a private trail centre called La Fenasosa that I’ve seen. Think it might be about an hour away? I’ll be looking into it next time I’m over.