Good conditions with climbs to 3500m and decent Cu.  A convergence running north with a SE curving around the mountains.  We went from Lastra, the first time this year, though by 2.30 pm the wind came onto PN.  After some quite violent climb outs we set out towards the resovoir, some 30km N of take off, some returning to Piedrahita and others such as Earl going to Barco.  About 2.5 hours of flying.  Excellent evening conditons for the late flight also.