Iron sharpens iron. Built in Westmont, for the western suburbs.
Iron Flag Fitness was founded by Kelly and Jared McGriff-Culver with a simple belief: iron sharpens iron. Located at 20 East Chicago Avenue in the heart of Westmont, Illinois, we've built more than a gym — we've built a training ground where people from all walks of life push each other to be better.
We specialize in CrossFit, HYROX race preparation, youth athletic development, and personalized training. Our programs span the full spectrum — from kids under 10 learning the joy of movement, to teens building explosive athleticism, to adults chasing PRs, weight loss, or simply a better quality of life.
What sets Iron Flag apart is our coaching. Every session is led by experienced, certified coaches who know how to scale workouts, correct form, and motivate you on the days when showing up is the hardest part. We don't believe in one-size-fits-all fitness. We believe in meeting you where you are and taking you where you want to go.
Our facility serves the entire western Chicago suburbs — Westmont, Downers Grove, Clarendon Hills, Hinsdale, and Darien — and our doors are open six days a week, from early morning to evening. Whether you're a competitive athlete or someone who's never set foot in a gym, you belong here.
Iron sharpens iron. Come find out what that means.
Everything you need to know before walking through our doors.
Best gym I've ever been a part of. The coaches genuinely care about your progress and scale every workout so you're always challenged but never lost.
My kids absolutely love the youth program. The coaches make it fun while actually teaching them proper movement and athletic skills.
I was nervous to try CrossFit at 45 with no experience. Six months in and I'm stronger than I've been in decades.
The personal training at Iron Flag is top-notch. I'm now lifting pain-free for the first time in years.
Great facility, amazing coaches, and a welcoming community. The HYROX prep classes are legit.