Middle Teton, South Ridge. On the Middle Teton between the southwest and southeast ridges, both of which lead to the south summit, is a jumbled area of rock and snow the uppermost portion of which contains a ridge that terminates on the southwest ridge. The first ascent of this moderate ridge was made in July, 1957, by Yvon Chouinard and Ken Weeks. The couloir bordering the ridge on the south had been descended in 1929 by Fritiof Fryxell and Phil Smith.