Joined Ken, Sabrina and others to lend a hand with an "intro to rock climbing" seminar. Against the advice I normally give of not going to the desert in the summer, we went out to Vantage. We climbed at the Feathers on the north side, so we were not in direct sun. Temps remained moderate and climbing was enjoyable. The novices seemed to have fun, and I as a leader had a good time and got to climb plenty. Learned how to self-belay with a GriGri as well. Finally climbed the Beckey Route (5.7) there as well. In the early afternoon we had enough climbing and drove down to the Columbia for a swim.