Nelson Day, Lead Guide.

Nelson Day, the Lead Guide and Director of The Climbing Life Guides, resides in sunny Joshua Tree, CA. Nelson has been rock climbing since 2008 and guiding since 2012, and is certified through the AMGA as both a Certified Rock Guide and Single Pitch Instructor, making him currently the highest certified guide in Joshua Tree. Nelson is also certified through Wilderness Medical Associates as a Wilderness First Responder (WFR). Read more...

Nelson received a bachelor of science degree in Mechanical Engineering from the University of Missouri at Rolla in 2002, and is registered in the state of California as a professional engineer in Mechanical Engineering. Nelson’s love for teaching, guiding, and rock climbing is evident if you have ever climbed with him as a client or partner. Nelson has rock climbed in Indian Creek, Joshua Tree National Park, Tahquitz, Big Bear (Holcomb Valley), Riverside Quarry, Moore’s Wall, Red Rock Canyon, New River Gorge, The Incredible Hulk, Squamish, the Bugaboos and various other cragging destinations. Nelson specializes in assisting clients “reach” their rock climbing goals and rock climbing objectives in a patient and positive environment.

Nelson Day Lead Rock Climbing Guide at Joshua Tree

Stephen Williams, Guide.

Stephen grew up in the flat lands of Memphis, TN and cut his teeth as a climber on the steep sandstone of the Southeast. He’s been climbing since 2009, and passionately seeking out new challenges in the mountains ever since. His personal climbing experience ranges from grade V alpine routes in the North Cascades of Washington, to long rock routes in the desert Southwest, to ice climbing in the Canadian rockies. He is an AMGA certified Single Pitch Instructor and is actively pursuing certification in both the Rock and Alpine disciplines. Read more...

Stephen also holds a WFR through the Wilderness Medicine Institute and a degree in Biology and Math from Oberlin College. He currently splits his time between alpine work in the Cascades and Alaska during the summers and guiding in Joshua Tree the rest of the year. Regardless of the medium, Stephen finds the process of helping people push themselves in the outdoors and gain independence as climbers tremendously rewarding.


Molly Massena, Guide.

Molly is a Washington native but has climbed extensively all over the United States. She worked guiding the multi-pitch alpine style of Seneca Rocks, WV before coming back to the West Coast to work in Joshua Tree. A certified Single Pitch Instructor currently, Molly is actively working towards her Rock Guide certification through the American Mountain Guides Association. Read more...

When Molly isn’t guiding she is practicing her emergency medicine skills as a Ski Patroller and Downhill Mountain Bike Patroller or beefing up her backcountry skiing credentials.

Whether new to climbing or have been at it for years, Molly is always excited to spend time outdoors with clients.


Greg Petliski, Guide.

Hi, I’m Greg and I can’t wait to go climbing with you, your friends and family, and one day, the whole world. Ever since my fingers first graced rock in 2015, I have pursued little else. Sharing the thing I love most with others, helping them conquer not the mountain but the uncertainties within, it all brings me total joy. So, let's go climbing!

Greg Petliski Rock Climbing Guide at Joshua Tree

Zack Smith, Guide.

Born and raised in Northern Los Angeles, CA; Zack Immediately found a passion for exploring and pushing himself in the outdoors. After high school, Zack discovered rock climbing and immediately fell in love with it. Zack’s drive to climb beautiful features and formations, has led him to travel across the states and abroad. Read more...

When he isn’t out on a climbing trip, you can find him climbing in his local crags, Joshua Tree and Tahquitz, or training for his next ultra-endurance run. He is currently an AMGA certified Single Pitch Instructor and is actively pursuing certification in the Rock discipline.

Zack Smith Rock Climbing Guide at Joshua Tree