Chelmsford has 7 official CrossFit affiliates and 1 HYROX or functional box. Drop-ins cost 15 GBP, with a median of 15 GBP across the 3 gyms that publish a price. Four gyms list open gym, and two of them also offer HYROX sessions.
| Gym | Area / Transit | Type | Drop-In | Weekly | Climate | Book |
|---|---|---|---|---|---|---|
| CrossFit Muscle Yard | Rayleigh | CrossFit Affiliate | 15 GBP | – | – | Website |
| Two Tails CrossFit | Wickford, Essex | CrossFit Affiliate | – | – | – | Website |
| CrossFit Rayleigh | Lubards Farm, Rayleigh | CrossFit Affiliate | – | – | – | TeamUp |
| CrossFit Blackwater | Witham, Essex | CrossFit Affiliate | – | – | – | Website |
| CrossFit Braintree | Lakes Industrial Park, Braintree | CrossFit Affiliate | – | – | – | Website |
| CrossFit 13 | Hutton, Essex | CrossFit Affiliate | 15 GBP | – | – | Website |
| CrossFit Atlas Witham | Briarsford Industrial Estate, Witham | CrossFit Affiliate | 15 GBP | – | – | WodBoard |
| Two Tails CrossFit | Witham | Functional Fitness Box | – | – | – | Website |
A good fit for beginners and returning exercisers who want coached, scaled classes in Rayleigh. Drop-in places are limited, so reserve through the website form before you come.
Best for: Beginners, Returning exercisers, HYROX prep
Suits people who want coached CrossFit classes and a community feel in Essex, with open gym included in memberships. Before going, book a free taster, since the site lists a 7-day trial for £25 that is refundable on joining.
Best for: Coached CrossFit training, Essex-based members
This suits adults who want an established CrossFit community in Rayleigh and can complete the foundation course first. New members must finish the foundation course before joining regular classes, so book that on TeamUp before you visit.
Best for: Local CrossFit regulars
Suited to beginners and general fitness members who want small, coached classes with rolling monthly contracts. Ask the gym about the drop-in price and the timetable before you visit, because the sources do not list them.
Best for: Beginners, Local members
Suits athletes who want coached CrossFit classes and HYROX training sims in Braintree. Before going, book a Free Intro, because the adult membership prices are not published on the site.
Best for: Beginners, HYROX prep, Families with children
Suits people new to CrossFit who want a free taster and coached sessions near Brentwood. The one thing to know: a single visit is arranged by contacting the gym, not booked online.
Best for: Beginners, Visitors wanting a free taster
Suits beginners and anyone who wants coached CrossFit in Witham, Essex. Book the free intro first, because the gym arranges your first session by contacting you after you register.
Best for: Beginners, Coached CrossFit
Also known as: Two Tails CrossFit South Witham
Suited to people who want coached CrossFit and weightlifting classes in a community setting. Official pages give a Wickford, Essex address, while third-party listings place the gym in Witham, so confirm the address before travelling.
Best for: CrossFit and weightlifting classes, Members wanting a community gym
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HYROX prep
CrossFit Muscle Yard
It lists HYROX sessions at several times including 7:30 PM, plus a 15 GBP drop-in booked through the website form.
First drop-in
CrossFit 13
A one-off session costs 15 GBP, a free taster is available and there is no joining fee.
Open gym and monthly pass
CrossFit Atlas Witham
It lists open gym, a 15 GBP drop-in valid 30 days and unlimited membership at £90 a month.
Staying a week
Two Tails CrossFit
The 7-day trial costs £25 and is fully refundable if you join, with classes seven days a week.
Families with children
CrossFit Braintree
CrossFit Kids costs £25 per month and Teens Silver costs £35 per month, with HYROX training for adults.
The gyms are spread across south and mid Essex. Several sit on industrial estates or farm units, so check the address before you set off.
The official Two Tails CrossFit pages give a Wickford address, while other listings place a gym in Witham. Confirm the address with the gym before you travel.
Three gyms publish a single-visit price, and all three charge 15 GBP:
No gym lists a weekly pass. These monthly prices are published:
| Gym | Monthly option | Price |
|---|---|---|
| CrossFit Rayleigh | Unlimited | £85 |
| CrossFit Atlas Witham | Unlimited | £90 |
| CrossFit Atlas Witham | 10 sessions | £75 |
| CrossFit 13 | Twice weekly | £105 |
| CrossFit 13 | Unlimited | £130 |
CrossFit Rayleigh also lists 9 sessions a month at £65.
Two Tails CrossFit offers a 7-day trial for £25. The fee is refundable if you join.
Two Tails CrossFit in Wickford, the Witham Two Tails CrossFit, CrossFit Atlas Witham and CrossFit Braintree list open gym. CrossFit Muscle Yard and CrossFit Braintree list HYROX training.
35 sources checked on 2026-11-12. Prices come from the gym's own pages.
crossfitmuscleyard.com
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twotailscrossfit.co.uk
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maps.google.com
crossfitrayleigh.com
goteamup.com
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crossfit13.com
crossfit13.com
crossfit13.com
crossfitatlas.co.uk
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crossfitatlas.co.uk
wodboard.com
twotailscrossfit.co.uk
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crossfitlist.com
gymsfitness.co.uk
google.com
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crossfitblackwater.com
crossfitblackwater.com
crossfitblackwater.com
crossfitblackwater.com
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crossfitbraintree.com
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