Senior Guide
Chief Executive Officer
With RMI
Clients find Peter Whittaker’s passion for the outdoors contagious. But what else would you expect from someone who climbed Mount Rainier when he was only twelve years old? Guiding since 1973, Peter has organized and led trips all over the world.
In 1995, Peter organized Expedition Inspiration, in which he led a group of breast cancer survivors to the summit of Aconcagua. The climb raised over 2 million dollars for breast cancer research. Peter also served as the guide for both the oldest man and the oldest woman to reach the summit of Mt. Vinson in Antarctica: the top of the bottom of the world.
Peter co-owns Rainier Mountaineering, Inc. the largest guide service in the United States. Peter also has been the host of Trailside: Make Your Own Adventure, an Emmy-nominated outdoor adventure series on National Public Television. Born into a mountaineering family, Peter’s uncle Jim Whittaker became the first American to climb Mt. Everest in 1963. Peter’s father, Lou Whittaker has led numerous expeditions to the Himalayas, including the world’s three highest peaks.


240+ | Mt. Rainier, Washington, USA | 14,410'
2 | Mt. McKinley, Alaska, USA | 20,310' (expeditions)
14 | Kilimanjaro, Tanzania | 19,341' (expeditions)
6 | Chimborazo, Ecuador | 20,703' (expeditions)
6 | Cotopaxi, Ecuador | 19,348' (expeditions)
4 | Huayna Potosí, Bolivia | 19,870' (expeditions)
4 | Illimani, Bolivia | 21,201' (expeditions)
9 | Pico de Orizaba, Mexico | 18,701' (expeditions)
9 | Popocatépetl, Mexico | 17,802' (expeditions)
3 | Mt. Vinson, Antarctica | 16,067' (expeditions)
1 | Huascarán, Peru | 22,334' (expedition)
8 | Aconcagua, Argentina | 22,841' (expeditions)
3 | Mt. Kenya, Kenya | 17,068' (expeditions)
4 | Mt. Elbrus, Russia | 18,481' (expeditions)
1 | Mt. Everest, Nepal | 29,032' (summit May 19, 2009)
1 | 1984 American Everest Expedition, Tibet/China | reached 25,500'
1 | 1987 Snowbird Everest Expedition, Nepal | reached 27,000'
Multiple | Pacific Northwest Peaks, USA
Multiple | Hiking & Skiing (Dolomites), Italy
November 2, 2025
Program Name
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November 2, 2025
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Leadership
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