Cosley & Houston Alpine Guides

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For more than three decades we were an international climbing and skiing guide service owned and operated by UIAGM / IFMGA Certified Mountain Guides Kathy Cosley & Mark Houston, specializing in small-group and custom climbing and skiing trips and expeditions to the great alpine destinations of the world. We are now retired.

Thanks for visiting!
	Kathy & Mark

We’ve retired!

After more than three decades of guiding — from the Sierra to the Alps, the Andes to the Himalaya — we have hung up our ropes and are no longer taking bookings of any kind.

We’re keeping this site online as a free resource: route descriptions, ski tour itineraries, trekking information, and a few decades of trip photos and newsletters. We hope it helps you plan your own adventures, with or without a guide.

To everyone who climbed, skied, and trekked with us over the years: thank you. You were never just clients. You were our partners on the rope, our companions at the hut table, and so often our friends. For decades you were at the center of our lives, and sharing the mountains with you has been one of our life’s great joys.

— Kathy & Mark

You can reach us at hello@cosleyhouston.com

last site update: July 18, 2026 - see history

Awards from the American Mountain Guides Association more info
	"Outstanding Guide Award" Kathy & Mark 2005 "Lifetime Achievement Award" Kathy Cosley 2013 "Lifetime Achievement Award" Mark Houston 2014	Read our book!

Kathy Cosley & Mark Houston
UIAGM Internationally Licensed Mountain Guides

AMGA Certified • SNGM members
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