Contact Us:

6420 County Road 335 Unit B

New Castle, CO 81647

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Cory House



Cory grew up in Grand Lake, CO where he spent most of his time playing as many sports as he could.  It wasn't until college that he developed a passion for exercise and fitness.  He earned a degree in Kinesiology from Colorado Mesa University and then moved to New Castle to teach Physical Education and work as a trainer part time after school.  In April of 2015 he and his wife opened Defiance West and to share their passion with New Castle.  Cory believes everyone needs to find something that keeps them active for the rest of their life. Find something fun and you will keep doing it!

Cierra House

Owner/Nutrition Coach


Cierra grew up in Grand Junction, Colorado where she grew up playing volleyball.  She worked at a traditional gym all through high school and college and has always loved helping people stay active and healthy.  She and Cory moved to the RFV in 2011 where they enjoyed working out on their own, and eventually found and fell in love with Defiance in Glenwood Springs. She worked as a victim assistant and an elementary school teacher before their son, Eli was born.  She loves to hike, play outside, read, and be with her family.  She is a Certified Primal Nutrition Coach.

How It Works

     Your first step to start is to set up your first one on one Intro Class with Cory.  The Intro Class is a one hour session that will help you learn some more about our gym and the “why’s” behind the program. After answering any questions you will be taught some basic movements which will then be structured into a beginner level workout that you can complete.


     After your first class, talk to Cory about your goals, training time and whether you feel like this program is right for you. He will guide you every step of the way to ensure that you’re in the correct class and have the best opportunity to succeed.


       Pick a membership option that works for you – we have several different plans available to fit your schedule and training frequency. Unlike other gyms that require a contract to keep their clients, we don’t force contracts on our members – we rely on the excellence of our service to keep you coming back. Check out our            page for our membership information.