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.

Level 2 Fitness Instructor, Level 3 Personal Trainer, Level 2 CrossFit Trainer, Certificate in nutrition, health & performance

Level 2 Fitness Instructor, Level 3 Personal Trainer, Level 2 CrossFit Trainer, Certificate in nutrition, health & performance, Qualification in Pre & Post Natal training.

Level 2 Fitness Instructor, Level 3 Personal Trainer, Level 2 CrossFit Trainer, Certificate in nutrition, health & performance

Level 1 CrossFit Trainer

Level 2 CrossFit Trainer, L3 Personal Trainer, L2 Fitness Instructor

Level 1 CrossFit Trainer


L2 Fitness Instructor, L3 Personal Trainer

L2 Fitness Instructor, L3 Personal Trainer, L3 Strength & Conditioning Coach
Spanning 7,000 square feet, our facility is designed to offer a premium fitness experience for all levels. Whether you’re here for CrossFit, Hyrox, or Hot Yoga, you’ll find everything you need under one roof.
From fully equipped training floors to the BackRoom Recovery Suite with infrared sauna and plunge pools, and the BoilerRoom hot yoga studio, every detail has been built to support your training and recovery.
Purpose-built for serious training and lasting results.
Grab a coffee, a snack, or a cold drink and catch up with your crew before or after your session.
With classes on every evening & weekend, this is the perfect way to relax and recover after training.
Make use of our clean, modern facilities.
Loads of free parking at the front door.
Make use of our sauna or plunge pools and bounce back faster from those heavy sessions.
Sore muscles? Book in with our in house sports therapists Alan.
Downstairs you'll find our dedicated CrossFit area - plenty of space, all the gear, and serious energy.
Want to train solo? We’ve got a huge space for that too, with everything you need to do your own thing.
Upstairs on the mezz is where the magic happens with Hyrox, Burn, Build, and more.
Take it outside with our outdoor area —perfect for sprints, drills or those workout runs on flat ground.
