Heretic CrossFit is a CrossFit gym in Gaithersburg, Maryland, serving people in the Gaithersburg and nearby Potomac area. The gym emphasizes coached group training, proper technique instruction, accountability, encouragement, and a strong sense of community. Heretic CrossFit describes itself as the only doctor-led gym in the Gaithersburg area. Leadership includes owner and head coach Craig Stiritz (CF-L2) and coach Mike Boettger (CF-L1).