Yosemite Hiking Guide in High Country

Yosemite Hiking Guides

Dave Bengston

Dave Bengston

YMS Director, guide since 1985. AMGA Rock Certified Guide. Leave No Trace Master Certified. Extensive skiing and alpine climbing experience. Big wall guide with 48 ascents of El Capitan, many speed records. Numerous first ascents in Yosemite Valley, Tuolumne Meadows, and Joshua Tree, up to 5.13 and including Kaos, El Capitan. BS Physics.

Zach Irwin

Zach has worked with YMS since 2010 as a Nordic ski Instructor and hiking guide before being promoted to assistant manager in September 2012.  Zach enjoys ski hut trips in the winter. His prior experience includes guiding hikes and bicycle trips in the San Juan mountains of Colorado, mountain bike guiding and rock wall facilitation in Crans-Montana, Switzerland, as well as coordinating recreation programs at Penn State University where he earned a BS in Recreation Park and Tourism Management in 2009.  Zach has climbed many classic routes in Yosemite and is always looking to do more.

Greg Coit

Greg Coit

Greg grew up in New Hampshire where he discovered his passion for the outdoors. He graduated from the University of New Hampshire with a bachelors degree in Outdoor Education. Greg enjoys spending his time rock climbing, hiking, and skiing all over the country and has worked with several outdoor based companies over the past few years instructing and guiding each of these activities. Greg is also a graduate of the National Outdoor Leadership School where he completed a semester long course in the Rocky Mountains. He is a certified Wilderness First Responder, an AMGA Single Pitch Instructor, and a Leave No Trace Master Educator.  Greg has recently completed the AMGA Rock Instructor course.

Kari Brandt

Kari Brandt

Kari's passion for nature and outdoor adventure began as a child growing up in a small town in the mountains of Southern California. She has been leading outdoors trips at her university since the summer of 2007 and this is her first year with YMS. Kari now considers Yosemite to be her home and loves to share this magnificent place with anyone who wants to experience the spirit it has to offer. When Kari isn't hiking she enjoys trail running, rock climbing, skiing and slacklining to name a few.

Martin Anderson

Martin Anderson

Marty grew up at the Base of Mt. Hood in Welches, OR. He started skiing and snowboarding at a young age at Timberline lodge and Mt. Hood Ski Bowl where he worked for 5 years. Marty moved to Yosemite for the first time with his wife Erin Callahan, where they stayed for the summer. He moved here full time in April of 2009 and worked at the Ahwahnee bar for 3 years. He is the 9th member of his family to work here. His parents worked in the park for 9 years, they met in the Ahwhanee Dining Room. Marty has wanted to be a hiking guide since his first summer in the park when he learned he could share Yosemite with others for a living. He earned his Wilderness EMT.

Tesia Jankowski

Tesia Jankowski

Although Tesia grew up in Southern California going on hikes with her family, she spent most of her life in the flatlands of Wisconsin. During college she was introduced to rock climbing through an outdoor education program, which is when she discovered a passion for the outdoors. She led various backpacking, climbing and kayaking trips throughout her time there. She also studied and backpacked in Uganda, Peru and Australia. Her senior year she decided to apply to work in Yosemite, a place she had been wanting to experience. Now she loves sharing this incredible place with others. Tesia's certifications include Wilderness First Responder, BCU 3 Star Kayak, and Level I Rope Technician.

Annie Crowley

Annie Crowley

Annie Crowley grew up in a small town in Northern California that was once considered the chicken capital of the world. She went on her first backpacking trip in the Sierra when she was small enough to fit inside of a backpack and never looked back. The feeling of warm granite, the smell of the Jeffrey Pine, the meadows full of wildflowers, and the marmot are just a few things that draw her to the mountains. When not in Yosemite, Annie attends UC Santa Cruz where she pursues a degree in Environmental Studies and guides for the UCSC Recreation Department.

Eddie Santiago

Eddie Santiago

While on a month long backpacking trip in 2008, Eddie made an unplanned side trip to Yosemite and never left. Since then his desire to explore all facets of the Yosemite lifestyle have led to professional athletic endorsements, involvement in numerous non-profit programs and over 6,000 hours of wilderness survival training. Feeling that the valley had blessed him with a home, a new life and a wife - he approached the Mountaineering School in 2013 hoping to share these blessings and spread the message of conservation. Eddie specializes in light weight backpacking strategy as well as Native American management of California resources. He has taught Outdoor Education for the San Mateo School District and is a 23 years student of the Martial Arts. From rock climbing and running to crafting native tools, Eddie always has a trick up his sleeve.

George Ridgley

George Ridgley

Over 30 year hiking, backpacking and rock climbing experience in Sierra Nevada Mountains.