Drive down to the Sierra Espuna,south of Mula.
The village of EL Berro is off the C3315 Pliego to Alhama road and its the best place to start your riding.
There is a small campsite there with a big car park opposite.
The cafe opposite the parking,Espuna bar,is excellent for tapas with a really friendly owner.
The riding is great,and there is usually rides from the campsite on Tues,Thurs and Sat mornings at 10.
Orange test prototypes there,with a strong connection to the village.
No lifts so you will have to be fit,and routes vary from wide fire trails to virtually full on downhill stuff.
On Saturdays between 11 and 1 the Cafe at Fuente del Hilo in the park is usually full of bikers,road and mtb.
Just down the road from the cafe is the info centre with maps in the car park which can be used by walkers and bikers(no problem riding on established paths).The pena apartada route has a long fireroad climb with a fantastic descent.Ride it opposite direction to the board.
The Espuna is mountain biking in mountains on a far bigger scale to any UK trail centres.