Dýr - CrossFit®, Personal Training, and Nutrition of Mystic, Groton, CT

The center is an official CrossFit® affiliate. Last checked: 08/09/2025

CrossFit is a registered trademark owned by CrossFit, LLC, which is not affiliated with FitFit United States.

Information about Dýr - CrossFit®, Personal Training, and Nutrition of Mystic, Groton, CT

800 Flanders Road
06355, Ellsworth
+1 860-575-7605

Opening hours

  • Monday: 5:30 – 10:30 AM, 3:00 – 7:00 PM
  • Tuesday: 5:30 – 10:30 AM, 3:00 – 7:00 PM
  • Wednesday: 5:30 – 10:30 AM, 3:00 – 7:00 PM
  • Thursday: 5:30 – 10:30 AM, 3:00 – 7:00 PM
  • Friday: 5:30 – 10:30 AM, 3:00 – 7:00 PM
  • Saturday: 10:00 – 11:00 AM
  • Sunday: Closed

Services, Machines and Guided Classes

CrossFit®

Dýr - CrossFit®, Personal Training, and Nutrition of Mystic, Groton, CT: Opinions

5/5 (38 Opinions)
Top Rated Gym
April Cowan 2 years ago

Fantastic experience: Great experience!

Barbara Gebhardt 2 years ago

Fantastic experience: I love getting all the help I need with getting myself back in shape again after a long period of inactivity and letting myself go.

Lisa Grooms 2 years ago

Fantastic experience: Awesome gym! I love the vibe....always feel welcome.

Barry Boswell 2 years ago

Fantastic experience: Great facility, plenty of room, fun workouts and a warm community!!! Highly recommend

Lisa Adams 2 years ago

Fantastic experience: The coaches are amazing, the atmosphere is wonderful, it's a great place to workout and become a better person wether you want to be stronger, faster, more flexible it doesn't matter if you're an athlete or not, CrossFit Dyr is for everyone!

MonaLisa Payne 2 years ago

Fantastic experience: Thank you so much for working with me last month. I am looking for a crossfit gym in my area. I really enjoyed yours!

Sheri Cromarty 2 years ago

Fantastic experience: Love the community here!

Joseph Claro 2 years ago

Fantastic experience: Whenever I make it to Mystic I come here at least once. Great programming, attentive coaches and friendly members. Clean facility and fully equipped with Rogue equipment. Can’t recommend highly enough!

Brent Adair 2 years ago

Fantastic experience: Coaches are very friendly and knowledgeable. James and Sheri helped me feel welcome since day one and it is a great community to be involved in. As a new member to CrossFit, Shannon helped me learn all of the exercises and encouraged me through the workouts. Gym is very clean and the equipment is in great shape. Highly recommend this gym!

Matt Collinson 2 years ago

Fantastic experience: My wife and I only started going three weeks ago, but we love this place! Since moving to the area a year and a half ago, we have attempted to work out at home. We bought some equipment and figured we would save money and time in the long run. My wife stayed pretty dedicated. I got comfortable on the couch and started eating snacks. In short order I was back to “the worst shape of my life”. My wife and I had been members at another CrossFit gym in CT and found that the community was a huge part of the reason we showed up every day. We have been missing that. So I decided to reach out to a handful of local places and see if we could drop in and check out the box. After the first session at CrossFit Dyr, we were hooked. Sign us up for life! There are plenty of classes throughout the day, the members are all friendly- even when we go at 5:30 am, and the coaches have been amazing. They know when to push you and when to pat you on the back. I’m probably the worst “athlete” in the gym and they already have me doing things I haven’t done in over a decade. If you’re looking for a gym/ box that really feels like they want the best for you, give CrossFit Dyr a try. I can’t wait to see what they help me accomplish next!

Billy Buchholz 2 years ago

Fantastic experience: Great Gym and Friendly staff had Plenty of weights and space on the rig for me to complete my workouts. James was easy to schedule with and it was nice to have the gym more or less to myself. I will definitely be coming back here when I am in area to drop in again.

Melissa Whited 2 years ago

Fantastic experience: Best decision I have ever made!! I came here to get strong and also sign up for nutrition. The coaches are friendly and very knowledgeable; they easily modify workouts for me knowing I am in P.T. Six months later and my endurance is up and I am getting stronger too! Thanks guys!

Jay Kim 3 years ago

Fantastic experience: It’s a nice gym and the coaches are nice and very welcoming. Definitely going to go back when I return to Mystic.

Claudia Fuenmayor 3 years ago

Fantastic experience: Absolutely monster workout that put my strength training to absolute shame. Not for the weak, but if you’re weak, they will treat you like you’re strong. Fighting for my life right now, but thankfully did not die!!

Maegan Foisie 3 years ago

Fantastic experience: I must say, I hate taking my rest days because I have so much fun working out now. This gym and the warm community it has fostered throughout the years have helped me rebuild my relationship with exercising (and now nutrition)! Having been to a couple boxes in the past for work, I can honestly say I’ve found an incredibly dedicated group of people that push me better than ever. The WODs are varied enough for all skill levels and the Open Gym time is a great opportunity to build on other skills and techniques. Sign up - you won’t regret it!

Ryan Davis 3 years ago

Fantastic experience: Great space. Great vibe. Great workout.

Danielle Lorene 3 years ago

Fantastic experience: Great coaches, good workouts with lots of variety. Definitely recommend for an encouraging community with solid options for scaled workouts. Recommended for one on one PT, for a lot of strength building.

Andre Mudahy 3 years ago

Fantastic experience: Great experience, coaches are pretty knowledgable and easy going

Lee C 3 years ago

Fantastic experience: Sheri is a terrific guide and coach! A lot of energy here!

Brianna 3 years ago

Fantastic experience: Beginner to CrossFit and I was super nervous and intimidated to join, but needed more of a push in my life. The owners and members were so welcoming and go out of their way to help me along this journey. Couldn’t be more thankful I found a great gym on the first try!!!

Sarah Williams 3 years ago

Fantastic experience: Best workout of my life! The coaches are the best and so nice and helpful. Crossfit sounds intimidating but it's just a great workout that can be adjusted to any skill level.

Griffin Harris 3 years ago

Fantastic experience: Good weight, get strong

Ana Hall 3 years ago

Fantastic experience: Positive: Communication , Professionalism , Quality Every time I have a class, I always leave with a sense of accomplishment. Sheri (trainer) motivates you to finish the workout and makes sure the weight is appropriate ability or skill level. 10/10 always have a good time working out

Katie B 3 years ago

Fantastic experience: Positive: Communication , Professionalism

Alisa Morrison 3 years ago

Fantastic experience: The minute I walked in for my first workout, I was made to feel so comfortable and welcome. The coaches are fantastic and helped me with modifications to prevent injury. the workouts are fun but challenging and the members are all so friendly. The BEST gym in the area!

Kristen Fernandez 4 years ago

Fantastic experience: I’ve known Sheri for quite sometime, as she was my trainer prior to joining this CrossFit gym, at another gym facility a few years ago. She has always pushed me, and motivated me. This gym is amazing. Everyone is so welcoming, and they provide great instruction. I’ve been going for almost 2 months now, Monday thru Friday. The app they use is very easy to reserve classes, shows the workout of the day, shows who is attending, and you can put your personal bests in. James and Sheri are always so supportive and provide individual attention to all who attend class. If I look a bit confused or doing something wrong, they are right there to help me correct it. Besides the owners, the trainers who work there do the same. In all honestly, the entire CrossFit Dyr family (staff and members) does the same. I have never felt more welcomed and more supported at any other gym facility. The registration was very easy, straightforward, and detailed; explaining what was included. I feel incredibly lucky to have found a fitness community, filled with all levels of athletes, that encourage each other to do their best!

ilaria spezie 4 years ago

Fantastic experience: I moved to CT from Europe about 2 years ago. Not knowing anyone, the crazy weather, along with many cultural differences, made it very hard for me to adjust here. I’ve been CrossFitting for awhile and I’ve seen several boxes however, I can definitely say this box, the familiar atmosphere, the energy, the passion and the professionalism of the owners, James and Sheri have been my saving grace! If you’re looking for a great community, motivation, professionalism, and fun while keeping in shape and working on your goals.. look no further! CF Dyr is your place!

Kayleigh Daniels 4 years ago

Fantastic experience: Positive: Communication , Professionalism , Quality Love coming to this gym! Was in a workout slump & decided to start working out here... the atmosphere and motivation is unbeatable! Love the owners & coaches.. very knowledgeable & personable. I have never been to a gym with such a great community. 10/10 would recommend if you want to get in shape and make some friends!

Nolan Ceuch 4 years ago

Fantastic experience: Sheri and James are awesome coaches. They do a great job motivating you as well as developing diverse and challenging workouts for all skill levels. The gym equipment is top notch too, all new rogue equipment.

Kelly 4 years ago

Fantastic experience: Amazing coaching from all of the coaches. Always a fun atmosphere. Any level of athleticism can join, they are good at structuring the workout to whatever you can/cannot do. Such a high level or energy during the workouts to keep you going during the toughest workouts!!

Sabrina Reyes-Dods 4 years ago

Fantastic experience: Love this gym! Fabulous community with brand new facilities. I really enjoy the small gym feel and the intimate relationship you build with all the coaches. Everybody knows everybody here :)

Lauren Horlbogen 4 years ago

Fantastic experience: The atmosphere is unbeatable. The coaches are encouraging, supportive, and very knowledgeable. I cannot say enough GREAT things.

Sheri Grooms 4 years ago

Fantastic experience: Best Gym evaaaaa!!

Brook Flynn 4 years ago

Fantastic experience: Been there over a year and never felt so strong or confident in my whole life. Great support, encouragement, fun and can proudly call all of them my friends.

Corey Blumberg 5 years ago

Fantastic experience: Try it once and you’ll be hooked! All the coaches are knowledgeable and super friendly!!

Scott Bennard 5 years ago

Fantastic experience: This place is amazing! Huge clean gym with brand new Rogue gear... the owners and coaches are top-notch... I love the comradeship here... with athletes of all skill levels...

Rob M 5 years ago

Fantastic experience: Up and coming gym with an unbeatable price and even better coaches. Worth every drop.

Patti Sumara 6 years ago

Fantastic experience: Newly opened crossfit. Great attention and energy from the coach/owner, fabulous WOD. Alot to offer. Highly recommend giving it a try.

Leave your opinion about Dýr - CrossFit®, Personal Training, and Nutrition of Mystic, Groton, CT:

1 = Poor 5 = Excellent

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