Sam Hennessey

Sam Hennessey

Senior Guide: Washington, Alaska, International

A native of Port Angeles, WA, Sam’s outdoor career began at a young age in the small yet rugged Olympic Mountains. These days, he lives seasonally in Bozeman MT, making the most of the incredible ice and mixed climbing in the greater Yellowstone region. His favorite routes tend to be big walls or alpine rock and ice climbs. He guides for Alpine Ascents in Alaska and the Cascades, and has been lucky enough to make two trips to Antarctica. A former college athlete, his non-climbing interests include distance running, reading, and traveling to new places.

10-year

Significant Ascents

Rainier, 35+ Summits by 6 different Routes, ski descent
Denali, West Buttress – 7 summits, 8 expeditions
Mt Vinson – 7 summits
Denali, Light Traveler, VI M7 WI6, second ascent
AK Range, Mt. Hunter, Deprivation, VI AI6 M5
Nepal Himalaya, FA Chukyima Go, 6259m, V M4 85 degrees
Kishtwar Himalaya, FA Barnaj I, 6,370m, VI WI5+ M4
Patagonia, Cerro Standhart, Exocet, V WI5+ 5.10
El Capitan, The Nose in a Day, VI 5.10 C1

Certifications

IFMGA Certified Guide
Wilderness First Responder and CPR certified
Avalanche Level III
Leave No Trace Trainer

ifmga

I enjoyed the Vinson expedition immensely. It was well organized, I had excellent guides (that I was familiar with), and the food while on Vinson was great. Both Sam and Lakpa worked well together to lead our team of nine. You could see them consulting with one another to make the best decisions possible. Their […]

ALPINE ASCENTS BLOG

  • Cascades Conditions Report 7/2/2025

    Hello climbers, We’re excited to report stellar conditions throughout the region as we kick off July. From Mount Baker to Rainier and deep into the North Cascades, our teams have experienced consistent summit success and excellent travel conditions. On Mount Rainier, May brought a 44% summit rate—well above average for that time of year—followed by […]

  • Cascades Conditions Report 6/25/2025

    Hello climbers, Summer is officially in full swing in the Cascades, and conditions have remained stellar throughout the region. We’ve seen consistent summit success across Washington—from Mount Baker to Rainier and beyond—and guides are reporting some of the best early-season conditions in years. In Alaska, we still have one Denali team remaining on the mountain. […]

  • Cascades Conditions Report 6/17/2025

    Hello climbers, We’ve had an incredible stretch of weather in the Cascades over the past 10 days, allowing teams to summit peaks across the region. In the far north, we’re thrilled to report that three of our expeditions have reached the summit of Denali— huge congratulations to all climbers! Two more teams remain on the […]

Partners & Accreditations

Alpine Ascents International is an authorized mountain guide service of Denali National Park and Preserve and Mount Rainier National Park.
© Copyright 2025 All Rights Reserved. Alpine Ascents International