of the Angeles chapter and served as its chair in 1976. He had an obsession with “lists.” He finished climbing all three lists of the Angeles Chapter including Sierra Peaks, Desert Peaks, and Hundred Peaks sections. In addition to receiving all the awards available from the Angeles Chapter, in 1997 he was given the Sierra Club’s Oliver Kehrlein Award. This was the Sierra Club’s top honor for outings leadership. Mac’s love of the mountains and finishing lists involved climbing more than 1,500 mountains in California, Nevada, and Arizona as well as all the high points in every state in the United States except Alaska. His great contribution to the Sierra Club was the development of hundreds of other leaders. His skills as an organizer in the outings program are legendary.
In addition to aeronautics, he knew a lot about European/ U.S. history and geology. He enjoyed sharing his knowledge with his fellow climbers around evening campfires and on the trail.
He was a mentor both at work and on the trail, having an encouraging word for everybody and showing an interest in what they were doing. Mac was a great engineer/entrepreneur and a kind, generous friend.