THE Best Gym in Grays, ES

Find your workout tribe

For over a decade we’ve helped people in Grays become fitter, stronger and healthier through world-class coaching, a welcoming community and a team that genuinely cares.

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Woman lifting barbell
Expert Coaching & Personalised Training
Cutting-Edge Equipment & Facilities
Supportive Community to Keep You Motivated
Woman pushing sled forward

Helping You Train
with Confidence

Our mission is to help you feel confident in your body and capable in your training. With expert coaching and flexible Programmes, we make it easier to stay motivated and build lasting strength, one day at a time. CrossFit Thurrock is just off the A13 and very close to the 73, 100 and 83 bus routes, making us easy to reach from across Thurrock.

Meet Coach Online
Come see what it’s like to train with us

Meet Your Coaches

crossfit thurrock owner roice gummer training

Roice Gummer

Head Coach, Owner, General Dogsbody, Weightlifting Coach
CrossFit Level 2 Trainer (CF-L2)
Personal Trainer Level 3 (L3
British Weightlifting
Arc Gymnastics Level 1
Nutrition for Weight Management
Nutrition for Sports and Performance
CrossFit Coaching The Aged Athlete Certificate
CrossFit Scaling Certificate
Roice is a passionate coach with over a decade of experience helping people improve their fitness, confidence, and quality of life. With a background in the military, qualifications in...
Irene Simpson coach at CrossFit Thurok

Irene Simpson

CrossFit Level 1 Coach, Juniors & Teens Coach
CrossFit Level 1 Trainer (CF-L1)
CrossFit Educators Certificate
Irene believes that fitness is about far more than just getting stronger — it’s about building confidence, developing life skills and helping people realise what they are capable of....

Explore Our Programmes

CrossFit

Ideal for:
Adults 18+ of all fitness levels
Focus:
Strength, Conditioning & Overall Fitness
Build strength and endurance with varied, high-intensity workouts.

Teen Programme

Ideal for:
Teens (13+)
Focus:
Strength, confidence, and healthy habits
Strength, focus, and healthy habits for teens.

Personal Training

Ideal for:
All ages and fitness levels
Focus:
Personalised Strength, Fitness & Conditioning
Work 1-on-1 with a coach to reach your goals faster.

What Our Members Are Saying

Our members love the community and the results. Read their stories and see how they’ve reached their fitness goals.

How to Get Started at The Best Gym in Grays, ES

Get Started with a Video Call
Meet virtually to discuss your goals and next steps.
Make a Plan
Work with a coach to build a clear plan around your goals and fitness level.
See Results
Follow your plan and track progress over time.

Frequently Asked Questions