Sierra de La Cabrera. I did get back to the bar just in time, which was the important thing!
Full screen gives one 'the only way is up' incentive!
If averagely fit, you get to the summit in about 45 minutes from here. I actually find that coming down takes only marginally less time - say 35 minutes - due to the powdery, unstable nature of the rough paths; these are always easier to ascend than descend!