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The Mumbles Triathlon is an epic event which is really well-organised and participants are offered all the amenities they need to complete the course. The course is challenging but can be completed by athlete's of all abilities. Come for the atmosphere, the challenge and the slipway swim start.
C-19 Plan
Activity Wales Events has confirmed that this event will be going ahead as planned on Friday 2nd Oct 2020 in accordance with the COVID-19 safety measures. Learn more

How to enter the Mumbles Triathlon

  1. Middle Distance

    Triathlon: Swim 1.2mi, Bike 56mi, Run 13.1mi
    Event passed
  2. Sprint Distance

    Triathlon: Swim 0.75km, Bike 32km, Run 5km
    Event passed
  3. Super Sprint Distance

    Triathlon: Swim 0.75km, Bike 21km, Run 2.5km
    Event passed

Mumbles Triathlon routes



The swim will take an anti-clockwise direction. You will swim around the large orange buoy and then head out across to the second buoy and then back to shore. The Middle distance will be a 2 lap course and the Sprint and Super Sprint will be a 1 lap course.


The 56 mile route is a 3 lap course around the Gower peninsula. There will be a feed station which you will pass, we recommend you start the course with 2 full bottles on board.


The 4 lap Run Course comes to a total of 13.1 miles.


Middle Distance -

Swim - The triathlon will start with a 2 lap 950m course off the Mumbles Bay.

Bike - This is the 56mile course for the bike. There is also a feed station stop on route.

Run - The run will be a 4 lap route across the bay. Very flat course with beautiful scenic views.

Sprint Distance -

Swim - This will be a 1 lap course which will start after all the middle distances have started there 2nd lap.

Bike - This is an out and back course of 32k on the bike.

Run - The run will be an out-and-back flat route, across the mumbles bay, finishing on the red carpet.

Super Sprint -

Swim - This will be a 1 lap course which will start after all the middle distances have started there 2nd lap.

Bike - This is a 1 lap course out and back on the bike for 21k.

Run - The run will be an out-and-back flat route, across the mumbles bay, finishing on the red carpet.

Event Details

What’s Included
  • Chip timing
  • Marshalled route
  • Signed route
  • Water stations
  • Toilets
  • Photography
  • Goodies
  • Awards
Raceday Logistics


Registration will be at the Mumbles Yacht Club.

You will need your photo ID and a signed disclaimer form to register. Without these we have the right to stop you from competing. Only you can register, you are not allowed to register somebody else.

Entries are non-transferable, so if someone else takes part under your details you and the person racing will be disqualified and banned from all Activity Wales Events.

At registration you will receive an envelope which will include the following: 2 x Bib Numbers, 1 x Helmet Number, 1 x Bike post Number, 1 x Timing Chip and 1 x Swim Hat. Please make sure you complete the medical information on the back of your bibs.

Pre event Massage will be available at registration from Vicki White Sports Massage.

Please remember to pick up any pre-ordered clothing at registration.



5.00pm–8.00pm: Registration — Open Mumbles Yacht Club

6.00pm: Beginners Briefing — Bike Racking

7.00pm: 2nd Beginners Briefing — Bike Racking


6.00am–7.20am: Registration Open — Mumbles Yacht Club

6.00am–7.30am: Transition Open — Knab Rock Car Park

7.45am: Mandatory Race Briefing — On the slipway

8.00am: EVENT START — Middle

8.30am EVENT START - Sprint

9.00am: Last Swimmer (Swim Cut-Off)

9.10am: First Bike Back

9.30am: First Sprint Athlete Home

11.15am: Bike 2nd Lap (Cut-Off) — B4436 Junction to Vennaway Lane

12.30pm: First Middle Athlete Home

1:30pm: Last Bike Back

3:30pm: Last Run Lap (Cut-Off) — Verdi’s

4:00pm: Last Athlete Home


Transition will be at the Knab Rock, Mumbles. Please make sure you have picked up your registration pack before trying to rack your bike.

Make sure you have numbered your bike and helmet with the numbers provided before entering Transition. Please make sure your helmet is on when you rack your bike. The transition area has been laid-out to create an equal transition for everyone - we have therefore not numbered the racks so you can rack anywhere.

You will be able to remove your bike, once all the bikes are back in Transition and all bikes must be removed after the last competitor has completed the event.

No bikes will be allowed into transition after 7:30am. All bikes are to be removed from transition by 4:00pm or 30 minutes after the last athlete has crossed the finish line.


At registration you will be given your timing chip which you must attach to your left ankle for the duration of the event. Race numbers must be displayed on the front during the run and the back during the bike. Failure to display your number could cause you to be penalised or disqualified. Race belts are permitted.


THIS EVENT IS A NON-DRAFTING EVENT. Each bike will have a draft zone that is 3m wide and 7m long (10m in long distance events). The measurement is taken from the front wheel of the bike to the front wheel of the following bike and is centered with 1.5m each side of the bike.

On approaching another competitor you must either keep back outside of their draft zone or you must overtake. If you choose to overtake, the cyclist you are overtaking is then responsible for dropping back outside of your draft zone.

If you have difficulty visualising the draft zone then the equivalent distance you must keep between your front wheel and the rear wheel of the cyclist in front is roughly the length of a large family car

Mikes Bikes will be in attendance should you have any last minute problems or adjustments. They can be found in the expo and transition area. We highly recommend that you visit them prior to the event for a full service to ensure that your bike is in full working order.

There will be a number of photographers & videographers out on course. Athlete pictures will be available online from Charles Whitton Photography

Should weather dictate, please make sure you have appropriate bright clothing and also have lights on your bike.


There is a compulsory pre-event briefing held on the start line which must be attended by ALL athletes. Any athlete not present at the briefing will be disqualified.


If you are unable to finish the race, you MUST report to an Official to inform them, and hand back your timing chip.


Unfortunately due to health and safety reasons, no MP3 players, iPods or any other personal stereos are permitted at any time.


We are very lucky to be granted the relevant permissions to stage the race in the Mumbles area, so please help us by reducing the environmental impact as much as possible and take all your litter home.


Please be advised that all the Marshals are giving their time for free and without their assistance we would not be able to organise the race. If possible, please show your gratitude whilst on the course and be aware that any abusive behaviour will result in immediate disqualification. Marshals are not permitted to stop traffic and are only on course for directional and safety reasons. It is your responsibility to ensure that it is safe to exit junctions when on the bike course.


Awards presentation
We will hold the presentation at approximately 15 minutes after the last athlete has crossed the finish line. If the weather does not permit this, we will send out the trophies free of charge. If you are unable to stay for the presentation but would like your trophy, we can post it out after the event with a £5 P&P charge.

You can find your results on our website We will let you know on our Facebook page when they are live.

Lost property
Any lost property that has been found will be brought back to the office. Please contact the event organiser direct after the event and if it has been found we will be happy to send it back to you with a P&P charge.
Kit List


Wetsuits are COMPULSORY during the swim and an athlete must only wear the issued swim caps provided at registration.


The run is flat and very comfortable under foot but please make sure that you have suitable running shoes.

Spectators are very welcome! There is a fantastic buzz at this event.

Where to eat

The Galley will be in attendance at the event selling bacon rolls, burgers, teas and coffees throughout the day.
Verdi’s will also be open from 10am.


Being part of the volunteer team can involve route marshaling, manning aid stations, pre and post-race set up… and everything in between! In addition to this, your encouragement and enthusiasm to both the athletes and the team is invaluable! It’s a great personal reward for you and makes a huge difference to the athletes on the day.

There’s some great benefits to being a marshal for Activity Wales Events including:

  • FREE volunteer event t-shirt
  • FREE packed lunch & drink (dietary requirements will be catered for)

As extra incentive, groups of 10 or more volunteers will get £200 towards their chosen team, club or charity! If you are supporting an athlete at the event or simply would just love to be involved, please register your details by clicking the button below, and registering your interest for the relevant events.

For more information about volunteering, please call 01437 765777.

Frequently Asked Questions

When will I receive my race pack for the Mumbles Triathlon?
Race packs must be collected on race day. You need a photo ID to collect your race pack.
At what time does the Mumbles Triathlon start?
The Mumbles Triathlon starts at 8am.
Are there aid stations on the course?
No, there are no aid stations on the course. If you require food and drink during the event you will need to carry it with you.
Is there a cut-off time for Mumbles Triathlon?
Yes! The cut-off is at 4pm but this should be plenty of time to complete the event.

Mumbles Triathlon weather forecast

Rain and windy until evening.

Predicted highs
Predicted lows
IconHigh chance of rain
IconModerate wind possible, up to 23mph

Meet the organiser

Are you the organizer? Claim this page

Founders of Ironman Wales and The Long Course Weekend, Activity Wales deliver premiere Triathlon, marathon, duathlon and swimming events throughout the UK. They also consult to the leisure industry and are firm believers in the experience over the race! Creating family friendly, athlete focused world class races in Wales!



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