2 flights 6 hours at Dog on Aug 1st 2015

I went down to Area 151 on Saturday morning after 3 epic days at Rampart, and then headed out to Dog with Travis and Paige.  First flight I launched at 1:00pm and flew for 3 hrs.   I went up again after lunch and launched at 6:00pm when wind turned north . The thermals just keep getting better, got 1000ft over the north ridge and went over to Elk and got really high  (4000ft AGL) until 9:00pm. The last group when up to launch around 7:00 and winds turn more NE so they didn't launch.