A South forecast with potential climbs to over 400m but quite stable till around 3pm. We had an early launch at Lastra. In fact we nearly did not go as it seemed very breezy. However, some cirrus calmed it down and allowed all to have a safe launch. Once over the back some surprisingly turbulend air,though once N or the Piedrahita valleythings settled with gentle climbs and a SSW wind of around 20-25km/hr. Only Tony made it beyong the Piedrahita Valley. As I did not make the early climb out I was behind and did not catch up till Tony landed after Peñaranda. This was just as I finally found a big climb to near 3000m and the clouds started forming along a clearly defined convergence. As we were getting over 70km/hr ground speed and for me it was now extremely difficult to get down to land near Tony at around 3.30pm, I suppose that this would have turned into a 200km+ day. Anyway, a nice evening flight at Lastra for all as compensation.