GateWay Mountain Center

Connecting People to Nature

 
 

Peter Mayfield
Founding Director/Guide

Peter has been a successful leader, pioneer and innovator in mountain sports programs for the last 27 years.  He has started three innovative businesses: CityRock, Yosemite Guides, and the Gateway Mountain Center, through which he has designed and delivered creative and successful outdoor educational programs for thousands of California youth.  Peter has served as Chief Guide for the Yosemite Mountaineering School, and as Chief Examiner for the Professional Ski Instructors Association (Far West). As the founder and General Partner of CityRock Gym, the first large urban climbing gym, Peter was a catalyst for the growth of indoor climbing in North America. As a consultant Peter has designed and developed adventure programs for Disney, Discovery Communications, and Posades Resorts.  As a creative mountaineer Peter has succeeded on first ascents on Yosemite's El Capitan and Half Dome, climbed new routes in Peru, Patagonia, and the Alaska Range, and pioneered difficult snowboard descents.  In addition, Peter has competed in sport climbing World Cups, Cross Country Skiing US Nationals, and performed for ten years with the aerial dance/climbing troupe, Project Bandaloop.
 
   

Emily Williams
Program Director/Guide

Emily was born and raised in Santa Cruz, CA. She is a graduate of Cal Poly, San Luis Obispo with a degree in Recreation, Parks & Tourism with concentrations in Environmental Education and Natural Resource Tourism. Emily has over 15 years of outdoor/environmental education experience, which includes: Directing an Elderhostel program in the Lake Tahoe area, Environmental Interpretor for CA State Parks, Outdoor School Director and Naturalist, Program Coordinator for Coastal Watershed Council and many years as a camper and camp counselor. She currently works part-time for Sagehen Creek Field Station developing and implementing environmental education activities in Sierra County Schools and is a part-time Director for Gateway Mountain Center. When not working, Emily enjoys hiking, camping, snowboarding, kayaking and cross country skiing. Emily is also a certified yoga instructor and teaches classes regularly.

 
   
Aaron Hagen
Education Director/Guide

After getting my Forestry degree at Berkeley, I joined Americorps to do habitat restoration work in the Davis and Woodland area.  I then got my teaching credential at Davis and moved to the Tahoe area, where I have continued to work on habitat restoration projects.  I've been teaching Science, all the sciences, at my small school in Truckee for the past 9 years.

 

   

Anna Toso
Education Director/Guide

Anna started her career in environmental education in 1983 as a farm and wilderness teaching intern at Slide Ranch, eventually becoming the program director for a number of years. Anna has been involved as a naturalist guide, teacher trainer, consultant, and director for a variety of other programs on the coast of California and in the Sierra Nevada, including Yosemite National Institute's Headlands Campus, Sierra Institite's South Lake Tahoe E.E. Program, Elderhostel (coastal programs and in the Sierra Nevada), Trips and Trails, and Gateway Mountain Center. Anna enjoys a hand-on approach to sharing the natural world with people of all ages and abilities.
 
   
Annie Overlin
Guide
With a BS in Botany from Colorado State, Annie has had a life long interest in botany and specializes in the floras of the Sierra Nevada Mountain Range and the Great Basin, and currently works as a botanist on a variety of different projects. Annie has a broad understanding of how plant distributions relate to geomorphology, hydrology, and surficial geology. She has been a naturalist guide for Yosemite Guides and the Gateway Mountain Center since 2002. Annie has also been a sponsored athlete for rock climbing and has travelled all over the world to climb.  In her spare time, she likes to ride her bike, paint, and spend time with her family and one year old daughter.
 
     

Chris Kelly
Guide

In 2000, I started teaching with Naturalist at Large 5th -12th graders.  Natural History and science were taught as well as fun group games and ropes courses/team building programs.  I taught throughout California including: Joshua Tree, Catilina Island, Point Reyes, Malibu State Park and Sequia National Park. In 2001, I settled in Lake Tahoe where my outdoor adventures brought me to Squaw Valley as a board patroller and in summers I started guiding local trips with Tahoe Trips and Trails, working with Elderhostel and Corporate groups. I now work with Tahoe Adventure company as well leading mountain bike/kayaking/hiking tours. When not working I enjoy cross country skiing, mtn. biking, hiking, and snowboarding!
 
     
Kelly Boire
Guide


Kelly Boire recieved her degree in horticulture and botany while working abroad at an organic farm in Sussex, England.  After relocating back to the US, she settled in Truckee, CA and has worked as a naturalist/guide in the Lake Tahoe area, Yosemite, Mendocino, Point Reyes and Moab, Utah for the past 7 years.  Through hiking, mountain biking, kayaking and lecturing she shares her knowledge and love of the outdoors by teaching others to explore and enjoy the natural world with enthusiasm and a sense of fun!
 
     

Marc Chaney
Guide

Marc Chaney was born and raised in Carmel Valley, CA. He graduated from California State University, Chico with a Bachelors of Science degree in Environmental Interpretation/Education. Marc interned for the USDA Forest Service in the Lake Tahoe Basin teaching students about Kokanee salmon. Currently he is an AmeriCorps member with the Sierra Nevada Alliance Partnerships, serving with the Tahoe Environmental Research Center and the Sierra Watershed Education Partnerships. Marc is currently a Wilderness First Responder and First Aid Certified. Marc loves to recreate, it doesn't matter where he does it. He loves to surf, swim, hike, camp, kayak, snowboard, snorkel, explore, and discover.

Nicole Deas
Guide
Anje Marshall Photo

Nicole was lucky enough to be born and raised on the North Shore of Lake Tahoe, in Tahoe Vista. She is a graduate of Humboldt State with a B. A. in Interdisciplinary Studies, with concentrations on, environmental science, political science, and women’s studies. She’s worked at a community supported agriculture farm, several after-school and summer outdoor adventure/naturalist programs for youth and worked as an environmental educator in Yosemite National Park. Nicole is currently serving as an Americorps member with the Sierra Watershed Education Partnerships. She plans to go back to school to get her teaching credential and a master’s degree. Hiking, backpacking, swimming, snowshoeing, playing at the beach, and kayaking are just some ways Nicole spends her free time. She also loves gardening, reading and cooking.
 
 
Robin McElroy
Guide
Anje Marshall Photo
Robin McElroy was born and raised in Alaska as an avid skier and backpacker.  After graduating from the University of Colorado at Boulder with a Bachelor of Arts, she moved to Tahoe where she has been living for the past 3 years. Her jobs, besides guiding for the Gateway Mountain Center, include ski patrolling at Squaw Valley, guiding whitewater rafting for Tahoe Whitewater Tours and guiding lake kayaking, hiking and mountain biking tours for Tahoe Adventure Company.  For fun Robin competes in the US Freeskiing Tour and World Tour of Big Mountain skiing.  She also enjoys backcountry skiing, mountain biking, hiking, backpacking, fly fishing and kayaking.
 
   

 

 

 

©2007 GateWay Mountain Center