Our Team



Suzi Morrow is an instructor/trainer here at Mountain Life Fitness. She holds a Certified Personal Trainer Certification through the American Council on Exercise, a Group Exercise Instructor Certification through the Athletic and Fitness Association of America and an Aquatic Instructor Certification through the Aquatic Exercise Association as well as being licensed by Zumba Fitness and Healthways/Silver Sneakers to teach classes in those formats. She has been a Grand County resident for 30 years who enjoys reading, travel, hiking, biking, fishing and snowshoeing. She is a wife, mom to four adult children, and a proud Nana to seven beautiful grandchildren, six girls and one boy ages 3-13, who are “the joys of my life.” Suzi enjoys helping people to achieve health and well-being by exercising and being active. "As a senior myself..." she says, "I understand the truth of MOVE IT OR LOSE IT!"


Gretta Fosha is an instructor and trainer at Mountain Life Fitness. She holds a Personal Trainer Certification through the American Council on Exercise. Gretta teaches indoor cycling and circuit classes and trains all levels of athletes, young and old. Additionally, Gretta is a mom, coach, and, along with her husband and family, a business owner. She loves to train and help others learn and improve in fitness, athletics, and subsequently, in confidence. Gretta comes from a background as an All-American collegiate swimmer and cross country runner and was formerly a pro-triathlete. “I have not met a sport or outdoor activity I don’t like. I enjoy helping others be an athlete whether that is something they consider themselves to be or not!”


Mackenzie Brenneman is an instructor and trainer here at Mountain Life Fitness. She is a American Council on Exercise Certified Personal Trainer and Fitness Nutrition Specialist. Born and raised in Denver, Colorado, Mackenzie moved to Grand County over 10 years ago and decided to call Grand Lake her forever home. When she’s not training at Mountain Life Fitness, Mackenzie works for Shining Stars Foundation, a CO nonprofit that provides outdoor, social and recreational programs for children and families facing pediatric cancer. Mackenzie loves all things outdoors including: backpacking, mountain biking, horseback riding, paddle boarding, fishing, skiing, and she’s an active volunteer for Grand County Search and Rescue. “Whether in the back-country or at the gym, I'm extremely passionate about helping others! Living an active and healthy lifestyle has changed my life in all the best ways and I hope to help others find that same happiness!”


Krysty Bosse has been teaching yoga for 6+ years and holds certificates in Hatha Yoga, Hot Yoga, Yoga For Healing and Personal Nutrition in addition to a Bachelor of Arts in Music Composition and Performance. In an effort to balance a fun yet healthy lifestyle, she discovered yoga 12 years ago and it changed her life for the better. She believes that every body, no matter size/shape/ability, can benefit from practicing yoga and eating healthfully. In addition to yoga, she teaches music lessons and guides outdoor adventures. As a singer songwriter, she  plays multiple instruments and enjoys hosting a weekly show on the local community radio station (tune in to  KFFR 88.3 on Mondays 2:30-4 for Krystal Clear). Formerly based in New York City, Santa Fe, Nashville and Denver, she is now quite pleased to call the Fraser Valley home. When not teaching or coaching, you can usually find her playing somewhere in the snow with her dog, Olive.


Danielle Schmieder is a Midwesterner at heart and has many obsessions including, but not limited to, trail/road running, mountain biking, tacos, singing, tennis, and making others feel awesome! A true girl boss that believes health and happiness are synonymous with good friends, clean food, moving your body, and fresh air!
She is a National Academy of Sports Medicine Certified Personal Trainer, Performance Exercise Specialist, and Behavioral Change Specialist, with a degree in Kinesiology and Human Movement Sciences. For over 15 years she has been helping others establish goals, motivate them to reach higher than they thought possible, and to create consistency towards exceeding those aspirations. My background in a Division 1 collegiate sport (cross country and track) and learning from others around me has taught me and given me the tools to show others YOU CAN and YOU WILL!

Management & Staff


Randi was born and raised in Denver, moved to Grand County 21 years ago. She loves being outdoors running, skiing, mountain biking, and hiking with her 4 dogs. Randi has completed the Mt. Evans ascent three times showing how she thrives on pushing herself.  She received her certification as a personal trainer in 2016, through the American Council of Exercise, and has been with Mountain Life Fitness since its opening in 2014.  "Health and fitness are a passion of mine.  I love sharing my passion with all of our members.”


Samantha was born in rural Minnesota and moved to Grand County in 2016 after graduating with a degree in hospitality and marketing. Since moving to Colorado, Samantha has discovered many new ways to pursue her passion for fitness. Her favorite mountain activities include whitewater rafting, mountain biking, hiking, backcountry skiing, camping, enjoying great craft beer, and keeping the puppy entertained!

Samantha is excited to be a part of the Mountain Life Fitness team!

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