top of page
EwsKLkgXIAMdfpz.png

Fitness Underground is no longer operating out of Collier's Hill. We'll be in our new space at 149 S Briggs St. (next door to Cristos) in mid-April!

Home: Image
Main Pic.png

WELCOME TO THE UNDERGROUND

A Community of Fitness

Home: Welcome

Active w/ Ash Online

Making virtual feel personal

Home: Video
IMG_2822_edited_edited.jpg

ONSITE AND VIRTUAL

Flexible Options

Onsite Classes: For those local to the Erie, Colorado area, we offer small-group boot camp style classes in an intimate boutique location utilizing: battle ropes, bosu, free weights, booty sprout, TRX, slam balls, the Tank, punching bags and more.

Virtual Classes: Get inspired and workout anywhere with little to no equipment! Our community works out in their living rooms, garages, basements, backyards, hotel rooms, parks, and more. 

Click to learn more:

Home: Class Overview
Home: Video

Take a Tour

Watch a guided tour of the Fitness Underground by owner and instructor, Ashley Marks.

Home: Video

VISIT BOOKING PAGE

Book a class, purchase a membership, and see reviews:

Home: HTML Embed
Home: Video

CONTACT US

149 S Briggs St
Erie Colorado 80516

Thanks for submitting!

Home: Contact