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Mark Grundon




Rock Guide- Mexico



I am an AMGA-certified rock climbing guide and have been guiding all over the US, from Colorado to Alaska, for 10 years. I currently split my time between Potrero Chico in Mexico and Yosemite National Park.

I am a strong believer in "living the dream" and recently retired from ski patrol to devote all my time to my true passion: climbing. I enjoy climbing both with Yosemite's biggest stars and first time climbers.

Among the achievements I am most proud of are 1-day ascents of El Capitan and Half-Dome in Yosemite. Contact me for an amazing climbing experience in Mexico or the US!

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Owen Collins


October, 2023

Mark is an amazing guide. He was prompt on arrival to our place early am, had a great, fun, upbeat attitude all day, and was completely safe. He timed our day perfectly and gave great beta for the cruxes

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Joshua Hall


October, 2023

Mark always puts big emphasize on developing and refining my own climbing skills rather than just pulling me up the mountain. He always finds the right balance between safety and speed and never sacrifices the fun part while keeping the seriousness of the undertaking in mind. He is a very skillful guide and fun to have around

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Marcos Martinez de Hoz


December, 2019

Climbing with Mark is great, he is very proffessional, very safety oriented and knows Potrero Chico thourougly. I enjoyed climbing with Mark very much and would gladly do so again.

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