One Space. Two Paths.
One Goal.

Your Best Self.

Boundary Belfast is home to Boundary CrossFit and Boundary Apex - two unique training experiences under one roof.

A purpose-built facility where performance, progress and community come together. Whether you’re powering through CrossFit workouts or grinding through Apex conditioning sets, this is your place to grow stronger, fitter, and more confident. We offer a full timetable of CrossFit classes downstairs, with a dynamic range of classes also available in our upstairs Apex area. Upstairs we offer Hyrox, Burn, Build/Build & Burn classes.

Choose Your Path

Find out more

What makes them different?

High-energy, coach-led group training combining strength, conditioning, and functional movements. Every session is scalable to your level, from beginners to seasoned athletes. Perfect if you want variety, challenge, and a proven method for building all-round fitness.

Our boutique mezzanine training space for high-performance small group training. Classes are focused, progressive, and easy to follow — no CrossFit experience needed. From Hyrox-inspired conditioning to BUILD & BURN hybrids, Apex is all about targeted results.

Can I Do both Boundary Crossfit and Boundary Apex?

You don’t have to choose. If you want both Apex and CrossFit, pick an All Access membership and train across both programmes.

About Us

Boundary Belfast is more than just a gym — it’s a community. We’re home to two distinct training experiences under one roof: Boundary CrossFit, our long-standing strength and conditioning programme, and Boundary Apex, our boutique mezzanine space for high-performance small group training.

Our mission is simple — to help you become the best version of yourself through expert coaching, smart programming, and a supportive environment that makes training something you look forward to.

From our roots as Boundary CrossFit, we’ve built a reputation for high-quality coaching, well-structured programmes, and a welcoming, driven community. As our members’ needs evolved, so did we — expanding to include Boundary Apex, a space dedicated to Hyrox-inspired conditioning, functional strength, and accessible training for all fitness levels.

What they say about Boundary Belfast

    
 
 
      Trustindex verifies that the original source of the review is Google. Boundary CrossFit 2 based off Heron Road, in Harbour Estate, Belfast.

A high end workout space giving the best possible opportunity to build fitness into everyday life, physical health and mental health.

Well worth a visit, everyone is super friendly and supportive.

Classes are also excellent
  
  Posted on Google  
 
    
   Sean Kinselley 
 
 
 
 
     Trustindex verifies that the original source of the review is Google. If I could give 10 Stars I would, I started doing crossfit when Boundary Belfast opened last year. I love this place, love the staff, coaches, members and everyone.
The facilities are amazing, first class coaching and equipment, hygiene is always on point. The coaches other than just coaches are psychologists and even better friends, they're always there to listen and provide positive advices.

I would highly recommend this place to everyone from kids to elder people, beginners to advanced etc.

Also, they have a hot yoga upstairs which is amazing and great for recovery

I love this place! <3
  
  Posted on Google  
 
    
   Juan Andonie 
 
 
 
 
     Trustindex verifies that the original source of the review is Google. First class CrossFit gym, facilities are second to none, coaching quality and programming is fantastic, snacks and coffee area always well stocked and atmosphere is phenomenal! Keep doing what you’re doing guys, cause you’re doing it so well!!
  
  Posted on Google  
 
    
   Victoria Adams 
 
 
 
 
     Trustindex verifies that the original source of the review is Google. I've been a member here for around 8 months or so and let me tell you, one of the best investments in myself I could have made. Coaches are absolutely amazing. As I have ADHD my short term memory can be atrocious so I literally forget the move I'm doing and Coach J specifically always takes the time to point out minor tweaks or reshow me the move to get it perfect! It's such a friendly group of people as well and people are so motivating! Always saying you can do it or come on when you're on that final stretch. Can't praise the place high enough. Intense workouts that leave you lying on the floor in a heap trying to breath haha! Once you start it is hard not to get the need to return for the feeling of absolutely smashing a workout! 10/10
  
  Posted on Google  
 
    
   Matthew McCaw 
 
 
 
 
     Trustindex verifies that the original source of the review is Google. Great venue and facilities
  
  Posted on Google  
 
    
   Jamie McKendry 
 
 
 
 
     Trustindex verifies that the original source of the review is Google. Proper crossfit here. 7 days out of 7. From 5 am until 9 pm.
Non stop sweating.
Great coaches and great atmosphere.
  
  Posted on Google  
 
    
   Simone Bernasconi 
 
 
 
 
  
  
 
 
   Google rating score: 5.0 of 5, based on 18 reviews