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Dennis has worked as a professional mountain guide since 1997. He has nearly 30 years of climbing experience. His passion for mountains and exploration has led him to climb and travel all over the world. In 1993 he worked as a volunteer in Nepal where he discovered his love of foreign cultures while helping the Nepalese people. He has worked for many well-respected guide services, including while ice guiding in New Hampshire’s White Mountains, and while working for RMI on Mount Rainier and in the North Cascades. His expedition experience includes Mount Everest in Nepal, Cho Oyu in Tibet, Ama Dablam in Nepal, Alpamayo in Peru, Denali in Alaska, Aconcagua in Argentina, Elbrus in Russia, Kilimanjaro in Tanzania, and many other peaks in Nepal and across the major mountain ranges of the United States.


  • Mount Everest (2 Expeditions, to 27’000)
  • Cho Oyu
  • Ama Dablam
  • Denali (2 Expeditions)
  • Aconcagua (4 Expeditions)
  • Mount Elbrus (6 Expeditions)
  • Mount Kilimanjaro (5 Expeditions)
  • Alpamayo
  • Illiniza North, Cayambe, Antisana, Cotopaxi, Chimborazo
  • Orizaba, Iztaccihuatl, La Malinche, Nevado de Toluca
  • Island Peak (5 Expeditions)
  • Lobuche Peak, Tent Peak, Naya Kanga
  • Mount Blanc
  • Mont Blanc du Tacul
  • Mount Rainier (60+ ascents via 6 routes)
  • Mount Baker (50+ ascents via 3 routes)
  • Mount Shuksan
  • Eldorado Peak
  • Sahale Peak
  • Forbidden Peak
  • Mount Olympus
  • Glacier Peak
  • Mount Hood
  • Mount Adams
  • Mount Stuart
  • Mount Washington (20+ winter ascents)
  • Presidential Range Traverse (10+ winter ascents)


  • AIARE Level II
  • Leave No Trace Trainer
  • Wilderness First Responder / CPR