Trillium Alpine Guides is a worker-owned cooperative dedicated to providing high-quality guided experiences and instruction for rock climbers, alpinists, skiers, and riders who share a love of the mountains. We believe that challenging yourself in the mountains fosters lifelong friendships, cherished memories, and a deeper appreciation for the natural world.

By adhering to the professional standards set by the American Mountain Guide Association, we work collectively to provide you with personalized adventures that will inspire and empower you to reach new heights. Together, we celebrate the spirit of cooperation and adventure in everything we do.

Guided Adventures

A climber in a crevasse during a crevasse rescue course on Mt. Rainier, WA

Our trips are custom-designed to fit your goals and schedule so you don't have to settle for a one-size-fits-all approach. Our climbs have a low climber-to-guide ratio to provide the best mountain experience.

Contact us now to start planning your next adventure!

  • “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

  • “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 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