Who Are We?

Koby Yudkin

Ben Lim

Trillium Alpine Guides was founded to share a love for the mountains. Our mission is to inspire and empower individuals and our community through high-quality guided adventures, reputable technical instruction, and accessible mentorship. We believe that safe and responsible adventures allow us to learn about ourselves, build community, and develop a deeper connection with the natural environment. We invite you to approach the mountains with curiosity and humility.

Upcoming Programs

April 12th: Mt. Hood, Avalanche Rescue Course / 6 Spots Available

April 19th: Mt. Hood, Folkrm Ski Camp - First Tracks / 10 Spots Available

July 6th-8th: Mt. Baker, Coleman-Deming Climb / 6 Spots Available

July 11th-13th: Mt. Baker, Coleman-Deming Climb / 3 Spots Available

July 16th-18th: Mt. Baker, Coleman-Deming Climb / 6 Spots Available

July 20th-22nd: Mt. Shuksan, Fisher Chimneys Climb / 2 Spots Available

October 3rd-5th: Smith Rock, Redpoint Camp / 8 Spots Available

“Koby was an expert in all topics covered. He took extra time to make sure everyone understood the skills being taught. Highlights for me were learning how to set snow anchors and crevasse rescue.”

Leslie F. - Crevasse Rescue Course
"I scheduled a private lesson to learn the ropes of backcountry skiing and could not have been more satisfied. Ben sat down with me to get an idea of my skill level, health concerns, and general safety. He was patient, positive, and very knowledgeable in the field. I felt very safe while learning this new activity and learned my strengths and weaknesses in this one lesson. I would highly recommend Trillium Alpine Guides to anyone wanting to learn this sport and plan for other lessons in the future."

Mary M. - Mt. Hood First Tracks Clinic
“It was a blast. The routes and setting were amazing. Koby was as solid as can be… amazing knowledge, good host and steward of the forest/mountain. I had an excellent time.”

Will H. - Mt. Olympus
"I had a fantastic solo tour with Ben - he was a great travel partner and we absolutely got the goods all around Mt. Lincoln and Judah, along with a couple inbounds pow laps to start. Loved getting the chance to finally go through the gates while getting a chance to learn a whole lot of uptrack tips & tracks from Ben's expertise. Good turns and smiles were shared! Your Sugar Bowl backcountry offering is truly unique, and I'd love to see more folks take advantage of it. It definitely has jumpstarted a desire to poke around & explore all the lines out of the area boundary. First though, I need to lighten my pack and/or work on my cardio so I can get more vert!"

Sam R. - Sugarbowl Backcountry Tour in Tahoe
“I had an incredible experience on Mt. Baker. Koby was professional, personable, knowledgeable, and just excellent for the job. He made us feel very welcome and made for a really wonderful expedition overall. I’d been thinking about and preparing for this trip for perhaps 6 months. It exceeded my expectations and will stay with me for years to come. Really, a superb experience and I can’t say enough about it.”

Matt G. - Mt. Baker
"Our family of 4 (with 2 young kids 6 & 8) booked a 4 hour family guide and we were lucky enough to be led by Ben. He was super knowledgeable about the area and climbing techniques. His calm and confident demeanor really helped with height jitters. He was precise and meticulous with his techniques and gear (which helped put me at ease) Our kids LOVED the experience of climbing! Highly recommend! Highlight of the trip!"

Kathry B. - Acadia National Park Rock Climbing
"Ben was an awesome guide and just an all around fun guy to be around. Would love to link back up with him next time I'm in the area. He did an awesome job picking terrain that was still holding good snow and was really flexible throughout the day."

Sam J. - Tahoe Backcountry Ski Tour
"Incredible experience climbing with Ben. Recommend ages 6+ because 'good listening ears' are a must."

Domenica E. - Acadia National Park Rock Climbing
"Our family had an amazing time. The climb location at Otter Cliff was spectacular with the rocky coastline and an expansive view of the ocean. Our guide, Ben, did an outstanding job. He was personable, encouraging, and patient. He gave excellent instructions on all the various climbing techniques. Thanks to Acadia Mountain Guide for such an awesome adventure!"

J.B. - Acadia National Park Rock Climbing