About Us

KJ Crossfit- Crossfit Family

Our Story

KJ CrossFit was born out of the desire to create a place that allowed people to not only get fit, but also become strong and balanced. We want to create athletes that are fit for whatever life throws at them, whether it is day to day challenges, or competition.

We LOVE CrossFit! We believe it is extremely effective and will help people reach many types of goals. CrossFit is the main form of training utilized in our gym. We also understand that there are things that can be added to CrossFit, in order to maximize results and prevent injury. Utilizing accessory work from strongman, Olympic weightlifting, and strict gymnastics, we are able to further enhance our athlete's development.

Meet the Team

KJ Crossfit- Coach Kristy

Kristy Bauer


Kristy grew up in Centennial, Colorado. She was a competitive horseback rider for many years. After moving to Longmont to take a job on a ranch, she found a school that was teaching thai kickboxing. After committing three years to kickboxing, CrossFit was introduced and she was instantly hooked. The complexity of the sport has kept her passionate and the intensity has gotten her the best results.

Bachelors Degree in Biology

CrossFit Level 1 Certified

CrossFit Gymnastics

USAW Sports Performance Coach

i99 Gymnastics Clinic

Attended clinics with Dmitry Klokov, Vasiliy Polovnikov, Jenny Arthur, Rachel Wood, Aimee Everett

Completed StrongFit seminar as well as in depth coaches week. Training was focused on the StrongFit philosophy and application.

Currently training with Jenny Arthur, weightlifter in the 2016 Olympics.

KJ Crossfit- Coach Jeremy

Jeremy Bauer

Owner & Coach

Jeremy grew up in Berthoud, Colorado. He played football and wrestled in high school. Jeremy is an Army veteran that served two tours in Iraq. He started CrossFit four years ago after it was introduced into the kickboxing school he was training at. He was instantly hooked by the variety and the intensity. Since then he has been competing in local competitions as well as coaching.

CrossFit Level 1 Certified

CrossFit Gymnastics

i99 Gymnastics Clinic

Clinics with Oscar Chaplin and Jenny Arthur

KJ Crossfit- Coach Tyler

Tyler Patty

Head Coach

Coach Patty was a four year varsity lettermen for El Dorado High School where he earned multiple all-conference honors and had appearances on the academic honor roll. After high school he received an athletic scholarship to play baseball for Hesston College. During his years there Coach Patty earned all-conference honors as a 1st Basemen and Pitcher. From there he transferred to Longview Community College leading the team in Inning’s Pitched and ERA before completing his Associate’s Degree in Psychology. Coach Patty finished his baseball career playing for Fort Hays State University. While pitching he amassed the most strikeouts and was runner up in innings pitched as well as wins. On top of these sport specific accomplishments, he was named Academic All-American his junior and senior seasons.

Following his academic and playing career Coach Patty joined the Erie High School program. Over the past 5 years he has coached multiple levels of skill and performance. Within this time he also had the opportunity to coach a pro-amateur baseball team and led them to the Semi-Final game of the Conference Tournament. Their only loss was to the championship winner. Coach Patty continues to work youth camps over the summer months working with all levels on skill and performance training.

In 2018, Coach Patty’s passion for sport and competition guided him into discovering CrossFit. His dream is to take this style of training to create a sports performance program that will help each athlete reach their max potential and make it to the next level.

CrossFit Level 1

i99 Gymnastics Clinic

KJ Crossfit- Coach Shelby

Shelby Patty


Fitness has always been a passion of Shelby's. She grew up in the sports world playing volleyball all through high school and college. Shelby began her college career at Blinn Junior College. In 2011, her team had an undefeated season which put them on the path to become National Champions. Shelby received the National MVP award pushing her into an opportunity to play at the Division I level. She finished her career at The University of Texas at Arlington where in her senior season her team finished 2nd at the Sunbelt Conference Tournament.

Having graduated with an Exercise Science Degree, Shelby knew she wanted to continue on in the fitness world for personal goals as well as a career. Shelby completed her Personal Training Certification in 2015 and her L1 CrossFit Certification in 2018. The community and the opportunity to build forever type of friendships is why Shelby loves being a Coach at KJ CrossFit. She credits seeing others achieve incredible success and transformation as the most rewarding opportunity in her job. "We are a family!"

Bachelors in Exercise Science

CrossFit Level 1

KJ Crossfit- Coach Matt

Matthew Rasler


Matthew was born and raised in Northeast Indiana, graduating college from Purdue University. As an outdoor enthusiast he was naturally drawn to the beautiful state of Colorado and relocated here with his wife Catriona in 2014. With a love for adventure and outdoor sports and more than 10 years studying Karate, CrossFit became a natural progression. Though a software engineer by trade, he has a particular passion for understanding how the human body works and adapts in sport and fitness and thrives on pushing past physical barriers.

Bachelors degree in Computer Science with minors in Anthropology and Mathematics

CrossFit Level 1 Certified

StrongFit Seminar

Clinic with Jenny Arthur



Coach BriBriana Brown

Coach and Nutrition Specialist

Briana grew up in Wilmington, Massachusetts and found her way to CO in 2019. She has always enjoyed being active from backyard obstacle courses to playing soccer, lacrosse and running track through school years. As time went on, her interest in health and wellness intensified. She started Crossfit in 2013 looking for a community and a good workout. The love was immediate. In 2018, she got her Crossfit Level 1 Certification and went through an intern program at her gym in MA.

As her love for health and wellness continued to grow she decided to leave her professional career in tech behind and is now a Nutritional Therapy Practitioner helping clients find their wellness by focusing on their bio-individual needs through nutrition and wellness. She is a total food lover and movement junkie so the match was meant to be.

  • Bachelor of Arts majoring in Psychology & Organizational Communications
  • Crossfit Level 1 Certificate
  • American Red Cross Adult & Pediatric First Aid/CPR/AED
  • Functional Nutritional Therapy Practitioner (FNTP)
  • I99 Gymnastics clinic
Crossfit Level I
Crossfit Judges Course
Dmitry Klokov Clinic
Aimee Everett Clinic
i99 Clinic

John Mehrtens

Olympic Weightlifting Coach

Mertz grew up in New Orleans, Louisiana where he grew up playing multiple sports but really enjoyed baseball and basketball the most. In high school, he was on the cross-country team, swim team and played football. After graduating high school, Mertz joined the Marine Corps where he served for 8 years and became a decorated war veteran in the Persian Gulf War. During his service he studied Kuk Sool Won Martial Arts for two years and played on a local Rugby team. After being honorably discharged, Mertz became a Police Officer for a local sheriff’s office near New Orleans until Hurricane Katrina changed his life. Mertz relocated his family to Northern Colorado and works for a local police department. Mertz coached competitive girls’ softball at a high level for 5 years in Northern Colorado. Mertz was introduced to Crossfit in 2006 and dabbled in it until 2013 when it really took hold of him and has been training since then. Mertz was able to podium in Crossfit competitions and has competed in numerous Crossfit competitions. During his Crossfit adventure, Mertz has taken numerous weightlifting classes from several different coaches and found the most joy in weightlifting. Mertz is a certified USAW Judge, Burgener Strength Weightlifting level 2, USAW Level 2 Weightlifting Coach and also attended Movement Fix clinic by Doctor Ryan DeBell.

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