Wyoming, Grand Teton National Park, Mt. Wister. On July 10, Jack Miller (36) and Joan Miller (32) were making an ascent of Mount Wister via the Northeast couloir. When they were about half-way up the couloir, Mrs. Miller attempted to warn Mr. Miller of some falling snow; however, he was hit with a large ball of snow. After the snow had passed he turned to see if Mrs. Miller was all right when a rock came down and hit Miller on the back of the right hand severing a tendon and fracturing a small bone in the wrist. They were able to make the descent unassisted and went directly to St. John’s Hospital in Jackson, Wyoming.

Source: F. Douglas McLaren, District Ranger.

Analysis: Falling rock and snow.