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iConquer US Guide Team

Mac McCaleb

Prescott, AZ USA

Meet the iConquer US Based Guides Leadership Team & Trainers
Mac: Charter Member of the iConquer Advisory Board, Lead Guide Grand Canyon, Executive Guide Trainer

Growing up in the desert of Arizona, Mac learned how to appreciate the unique landscape by placing himself in it. Climbing and hiking in the granite hills of The McDowell’s near Phoenix were where the outdoor adventure bug took hold. Mac has traveled to far away climbing destinations for any type of climbing, hiking, and cultural experience; all while working towards his American Mountain Guides Association Rock & Alpine Guide Certifications.

Incorporating his passions of the outdoors and education, Mac always seeks to provide a quality learning experience for new climbers and hikers that are looking to push their personal boundaries. Before joining The Walking Connection, Mac found himself in Prescott to attend the local University to complete his degree in Aerospace Engineering. Furthermore, he has worked locally in several roles as an outdoor-based educator for youth and adults through a local outdoor school and Prescott College. Mac currently teaches Physics at a local charter school when he isn't out in the mountains. Mac loves seeking out new experiences and sharing them with others and is excited to share his passion for education and preparing people to enjoy the outdoors and create unique memories.

Mac is a Wilderness First Responder, American Mountain Guides Association (AMGA) Certified Single-Pitch Instructor and an AMGA Apprentice Alpine Guide.”

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Brian: Charter Member of the iConquer Advisory Board, Lead Guide Grand Canyon, Executive Guide Trainer. Brian has been associated with The Walking Connection (iConquer) for 15 years. 


Brian has 25 years of experience in the fields of geology, hydrogeology, and environmental geology in the Southwest, Texas, Alaska, and Antarctica. He received his M.S. and B.S. in geology from Arizona State University.


Brian currently specializes in basin analysis, Quaternary geomorphology, and Geoscience outreach throughout Arizona. Brian has also several years of experience as an adjunct professor with Mesa Community College and currently teaches field-based geology classes with Scottsdale Community College.


He also was the lead instructor for the NASA Mars Education Program at ASU to mentor national K-14 science teams to research Mars. He continues to teach natural history backcountry courses with the Grand Canyon Field Institute. Brian’s first 10 years of experience as a hydrogeologist with the USGS, city governments, mining companies and private consulting firms has created a foundation for his ultimate goals in geology: to study, to educate, and to apply the Geosciences in our world.


Brian is an avid hiker and enjoys Arizona astronomy, wood- and silver-smithing, and spending time with his wife and two kids anywhere outdoors .

Nolan: Lead Guide Grand Canyon,

Content & Program Development iConquer & Walking Connection


Nolan is an avid hiker and rock climber who loves the outdoors. He recently graduated from Northern Arizona University with a degree in biology. 

He is Wilderness First Responder Certified, has experience educating and leading adventures at Grand Canyon.


A Sedona resident, he is also a ranger at Red Rock State Park, one of Arizona's most popular destinations.


Though relatively new to the industry, he has already proven himself as a thoughtful, strong and conscientious leader.  For  
iConquer he has led student groups, day hiking teams and multi-day hikes for a team of autistic university students at Grand Canyon. His passion is sharing his love of nature with people of all ages and abilities, from all walks of life.


Alex: Grand Canyon Guides Director, Hike & Physical Training Program Development and Manager, Guest & Onsite Adventure Manager & 

Grand Canyon National Park Liaison. 


As a Guide, Alex has led iConquer Grand Canyon day hikes for more than 4 years. For iConquer, he specializes in offering hikes that accommodate hikers of varied interests, fitness levels, and abilities. From the wheelchair accessible Rim Trail to the most difficult day hike in Grand Canyon, Alex is an expert creating just the right hike for the day for iConquer hiking clients.  


As Guides Director Alex is responsible for recruiting and assisting in new guide training. He assists in ongoing training and guide development, guide scheduling and staff team building.

Special iConquer Multi-Night Grand Canyon Adventures. Alex is a contributing developer and team member in the operations and administration of the iConquer Non-Profit Adventure Program.

He is a veteran of the US Navy.


Certifications: Wilderness First Responder CPR & First Aid Certified. 


Rock Climbing Guide, Prescott, Arizona. AMGA Single Pitch Instructor apprentice


American Institute Avalanche Research and Education certified in Avalanche Rescue and Recovery and Level 1 Avalanche Safety.

Kumara: Assistant Guides Director, Lead Guide Grand Canyon, iConquer Advisory Board Member


Kumara was born with a love of wild places and travel that has lead her to explore some of the most magnificent landscapes on earth. Growing up in Southern Oregon, Kumara has traveled the Oregon and California coasts by bike, has hiked Mt. St. Helens, backpacked through the local wilderness areas and spent her youth surfing in cold Northern California waters. Her love of nature and the outdoors compelled her to earn a BA in Conservation Biology at Prescott College where she studied with some of Arizona's best naturalists. Prior to joining iConquer, Kumara has worked as an avian field biologist counting raptors at the Grand Canyon and educating the public about migration, surveying many incredible remote areas of Arizona, and traveling to the Amazon and Malaysia for bird research.


Kumara is Wilderness First Responder Certified, has experience educating, mentoring, and guiding youth in wilderness and rural settings, and loves sharing her love of nature with people of all ages.


Kumara loves learning new languages, playing guitar, mountain biking, relaxing in her hammock in Oak Creek, and meeting people from different cultures. Through iConquer, Kumara is excited to guide people on amazing adventures and share her love of Arizona's parks and wild places. 

International iConquer Guide Team

Iceland - Run & Guai, Elizabet

Peru - Javier & Yessica, Martene

Italy - Sara

Spain - Jorge

Mexico - Sergio & Bryan

Portugal - Teresa & Francisco

Ireland - Russell, Brendan

Ecuador - Christian


Safari Photography Specialist

Nathan, Ian

Walking Safari Specialist

Chimpanzee Treks

Butati, Mwega


Tokyo - Kyoto

Sumiko & Kiki

Mt. Fuji

Brent, Luke

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