O.N. Athletics 24/7 Gym + CrossFit DYR

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United States
Mystic, CT
O.N. Athletics 24/7 Gym + CrossFit DYR

24/7 open gym access, strength training, commercial-grade equipment, CrossFit classes, and personal training serving Groton, Mystic, Ledyard & Gales Ferry.

09/23/2026

Congratulations to one of our diehard morning members, Shawn Deer, for finishing 3rd place in his age group this past weekend at Spartan Vermont! Absolutely incredible job!!🔥🔥🔥🔥

Shawn has attended almost every single 5:30am class for the past year and is one of our most dedicated members. He first joined 3 and a half years ago looking to lose some weight and since then, has completely transformed his body, gained a ton of strength and has competed in multiple events, always reaching higher 💪

We love you Shawn! Shawn Deer

09/15/2026

Our latest registrations are ready!!! There are still plenty of spots available, so register today🔥

Registration: https://tru-challenge.com/host/202610/2133/

TRU Challenge at
CrossFit Dyr
Mystic, CT
10/17/26

$90/individual and $180/team
Includes: (1) Athlete entry, (1) event shirt for each athlete if you register by September 12, 2026, (1) shot at the podium, (1) full day of TRU Challenge experience.

09/12/2026

Darcy is ready!!!! Last day to sign up and get the free shirt!!!

Registration: https://tru-challenge.com/host/202610/2133/

TRU Challenge at
CrossFit Dyr
Mystic, CT
10/17/26

Athletes who register by September 12, 2026 will have an official event shirt waiting for them at the Host when they check in.
Registrations after September 12, 2026 does not include a free shirt. Register early!

$90/individual and $180/team
Includes: (1) Athlete entry, (1) event shirt for each athlete if you register by September 12, 2026, (1) shot at the podium, (1) full day of TRU Challenge experience.

09/10/2026

Angela is ready!!!! Spots are going fast, register today!

Registration: https://tru-challenge.com/host/202610/2133/

TRU Challenge at
CrossFit Dyr
Mystic, CT
10/17/26

Athletes who register by September 12, 2026 will have an official event shirt waiting for them at the Host when they check in.
Registrations after September 12, 2026 does not include a free shirt. Register early!

$90/individual and $180/team
Includes: (1) Athlete entry, (1) event shirt for each athlete if you register by September 12, 2026, (1) shot at the podium, (1) full day of TRU Challenge experience.

09/07/2026

Jason is ready!!!!

Registration: https://tru-challenge.com/host/202610/2133/

TRU Challenge at
CrossFit Dyr
Mystic, CT
10/17/26

Athletes who register by September 12, 2026 will have an official event shirt waiting for them at the Host when they check in.
Registrations after September 12, 2026 does not include a free shirt. Register early!

$90/individual and $180/team
Includes: (1) Athlete entry, (1) event shirt for each athlete if you register by September 12, 2026, (1) shot at the podium, (1) full day of TRU Challenge experience.

09/05/2026

Kyle is ready!!!! 17 spots remaining!! Register today!

Registration: https://tru-challenge.com/host/202610/2133/

TRU Challenge at
CrossFit Dyr
Mystic, CT
10/17/26

Athletes who register by September 12, 2026 will have an official event shirt waiting for them at the Host when they check in.
Registrations after September 12, 2026 does not include a free shirt. Register early!

$90/individual and $180/team
Includes: (1) Athlete entry, (1) event shirt for each athlete if you register by September 12, 2026, (1) shot at the podium, (1) full day of TRU Challenge experience.

09/04/2026

Michael is ready!!!! 18 spots remaining!

Registration: https://tru-challenge.com/host/202610/2133/

TRU Challenge at
CrossFit Dyr
Mystic, CT
10/17/26

Athletes who register by September 12, 2026 will have an official event shirt waiting for them at the Host when they check in.
Registrations after September 12, 2026 does not include a free shirt. Register early!

$90/individual and $180/team
Includes: (1) Athlete entry, (1) event shirt for each athlete if you register by September 12, 2026, (1) shot at the podium, (1) full day of TRU Challenge experience.

09/02/2026

Madeleine is ready!!!! 20 spots remaining! Register today 🔥

Registration: https://tru-challenge.com/host/202610/2133/

TRU Challenge at
CrossFit Dyr
Mystic, CT
10/17/26

Athletes who register by September 12, 2026 will have an official event shirt waiting for them at the Host when they check in.
Registrations after September 12, 2026 does not include a free shirt. Register early!

$90/individual and $180/team
Includes: (1) Athlete entry, (1) event shirt for each athlete if you register by September 12, 2026, (1) shot at the podium, (1) full day of TRU Challenge experience.

09/01/2026

Isabella is ready!!!! 20 spots remaining!! Register today!

Registration: https://tru-challenge.com/host/202610/2133/

TRU Challenge at
CrossFit Dyr
Mystic, CT
10/17/26

Athletes who register by September 12, 2026 will have an official event shirt waiting for them at the Host when they check in.
Registrations after September 12, 2026 does not include a free shirt. Register early!

$90/individual and $180/team
Includes: (1) Athlete entry, (1) event shirt for each athlete if you register by September 12, 2026, (1) shot at the podium, (1) full day of TRU Challenge experience.

08/31/2026

Jon is ready!!!! 21 spots remaining! Register today!

Registration: https://tru-challenge.com/host/202610/2133/

TRU Challenge at
CrossFit Dyr
Mystic, CT
10/17/26

Athletes who register by September 12, 2026 will have an official event shirt waiting for them at the Host when they check in.
Registrations after September 12, 2026 does not include a free shirt. Register early!

$90/individual and $180/team
Includes: (1) Athlete entry, (1) event shirt for each athlete if you register by September 12, 2026, (1) shot at the podium, (1) full day of TRU Challenge experience.

Address

800 Flanders Road Bldg 9 Unit 5
Mystic, CT
06355

Website

http://onathleticsgroton.com/

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