If you are looking for a CrossFit gym anywhere in the St. Louis Area, most likely in south county, you should do your best to avoid CrossFit XTra Mile in Fenton Missouri.
CrossFitXtraMile recently located in a Fenton business park and have since provided nothing but pain, noise, and discomfort for the neighbors in the business park. The noise, the traffic, and the lack of respect for other businesses in the same park have left a very sour taste to many.
The Mad Blogger has a lot of respect for small businesses, and even for CrossFit gyms, but CrossFitXtraMile doesn't fit into TMB's circle of respect.
Definitely avoid this place.