Fierce45, a Westword 'Best of Denver' Pilates Studio, Opens in Castle Rock
By Connor Tien, DougCo Social
Fierce45, the Denver-born reformer Pilates brand, has opened a studio in Castle Rock — and it arrives with a trophy already on the shelf. Fierce45 was named Best Pilates Studio in Westword's 2026 Best of Denver, and the Castle Rock location is its newest, opening in summer 2026 at 658 Genoa Way, Unit C.
If you drive past the Genoa Way plaza — the same building as Gracie Barra and The Rock Salt Spa — that's it. The studio took over the Unit C space that most recently housed 30 Minute Hit, the boxing-circuit gym: a fitness-for-fitness turnover in the Castleton Center.
What Fierce45 is
Fierce45 runs 45-minute, high-intensity, low-impact reformer Pilates classes on its own machine, the FierceFormer. The studio's shorthand for the workout is "low-impact on your joints, high-intensity on your muscles" — a full-body, small-group class built around strength, flexibility, and endurance, with what the brand calls "endless variations, energizing music, and motivating coaches."
It's reformer Pilates dialed up: less slow-and-restorative mat class, more fast, sweaty, and structured. Coaches are trained to be, in the studio's words, "alignment savvy, muscle engagement focused, and fierce movement trained."
The award
Before landing in Castle Rock, the brand won Best Pilates Studio in Westword's 2026 Best of Denver — the alt-weekly's annual reader-and-editor roundup of the metro's best. It's a real credential for a boutique studio opening in a new town, and it comes with a following: the brand's Instagram, @fierce45, has more than 10,000 followers. The Castle Rock studio's early Google reviews are a perfect 5.0.
What it costs
New clients start with an intro offer — two weeks unlimited for $65. After that:
- Memberships (new-member rate, $119 first month, 3-month commitment): 4×/month $119, 8×/month $179, 12×/month $209, or unlimited $229/month. Military, senior, student, and teacher discounts are available with verification.
- Class packages: drop-in $35, 5-class $160, 10-class $300, and 20-class $500 ($25/class).
Classes run seven days a week — early mornings (as early as 5:30 a.m.) plus some weekday evenings, with weekend classes in the morning only. Coaches include Jessica Mack, Patti Lonsbury, Lauren Sanchez, and Catherine Brogno.
- Where: 658 Genoa Way, Unit C, Castle Rock, CO 80109
- Workout: 45-minute reformer Pilates on the FierceFormer, all levels
- Intro offer: Two weeks unlimited, $65
- Book / schedule / pricing: fierce45.com/pricing/castle-rock
- Contact: [email protected] · Instagram @fierce45
The best way to reach the studio is by email or an Instagram DM.
See the full listing on our Fierce45 Castle Rock directory page, or browse more new and coming-soon businesses in Douglas County.
Sources: Fierce45 Castle Rock location page, Fierce Movement, and Fierce45's Instagram @fierce45. Details, pricing, and the class schedule may change — confirm on the Fierce45 site before you go.
Frequently Asked Questions
Where is Fierce45 in Castle Rock?
Fierce45 is at 658 Genoa Way, Unit C, Castle Rock, CO 80109 — in the Genoa Way plaza, the same building as Gracie Barra Castle Rock and The Rock Salt Spa. You can reach the studio at [email protected].
What is the Fierce45 workout?
A 45-minute, high-intensity, low-impact reformer Pilates class on the studio's signature FierceFormer machine. Fierce45 describes it as 'low-impact on your joints, high-intensity on your muscles' — full-body, small-group classes with alignment-focused coaches, energizing music, and endless variations.
How much does Fierce45 cost?
New clients start with two weeks unlimited for $65. Memberships run from $119/month (4 classes) up to $229/month unlimited, with a $119 first month and military, senior, student, and teacher discounts available with verification. Prefer to pay as you go? Drop-ins are $35, and class packs are $160 (5), $300 (10), and $500 (20). See current pricing at fierce45.com/pricing/castle-rock.
Is Fierce45 good for beginners?
Yes — the classes are low-impact and built for all levels, with coaches who cue alignment and muscle engagement. The studio's pitch is to give it two weeks to feel the results.
How do I book a class or find the schedule?
Class schedules and booking are on the Fierce45 site at fierce45.com/location/castle-rock. The Castle Rock studio hasn't published a public phone line yet, so the best contact is [email protected] or an Instagram DM to @fierce45.