Mad Hatter Serpentine Duathlon

The event is organised by Serpentine Running Club

We regret to inform you that this event is now postponed due to the Coronavirus outbreak. Further information will follow for those already entered. We are hoping to reschedule at a later date.

This is a mass-start event with a 8:00am Start. The race starts and finishes in the beautiful grounds of Hyde Park. This is a non-draft legal race and is a BTF Championship event. Fancy dress is welcomed.

This event is for athletes of all abilities where prizes are given not just to the top finishers but also to athletes who wear the best fancy dress

Online entries: Pay by major credit/debit cards

Organised by Serpentine Running Club

Sunday 19th April 2020, start time: 8:00AM.

A fantastic racing opportunity, or as preparation for the 2020 duathlon/triathlon season. Start, finish, transition and registration will be the southeast corner of the park where South Carriage Drive approaches Hyde Park Corner.

Full race information can be found at:

Online entries: Pay by major credit/debit cards.


This race is supported by Royal Parks and the British Triathlon Federation.

If you would also like to support us please contact us at:


icon Registration

Race numbers will not be posted out in advance of the race.

Race numbers can be collected on race day from 6:45am until 7.35am.

All competitors must comply with BTF rules - including being licensed to race.

It is recommended that you read the BTF rules and regulations, which will be applied to all races. 

All competitors must be licensed to race, so non-BTF members will be required to pay a £5 levy for a day licence. This is payable on the day at registration, (This is not included in your entry fee).

BTF members must produce their licence at registration, or a £5 levy will be charged prior to racing.

icon Event Profile

Event Name

Mad Hatter Serpentine Duathlon

Event Distance

4K Run, 20.8K Bike, 7.4K Run


Picturesque run around the Serpentine (lake) on tarmac paths. The bike course is on the South Carriage Drive (closed to traffic). Don’t be fooled, it’s not flat but it should be fast and the road surface is good.




Water will be available along the run course and finish area.




The bike is traffic free but the run is not.


17yrs (on/before 31 Dec 2020)


Serpentine Running Club



The higher of £1 or 6% online service fee will be applied at checkout.


icon Prizes

Finishers medal for all!

Prizes for the following:

Male 1st, 2nd & 3rd place.

Female 1st, 2nd & 3rd place.

First Place Finishers in each age group (V40, V50, V60 etc)

Male and Female Team 1st, 2nd & 3rd (three to score)


icon Course Information

The race will start and finish in front of the Bandstand, Serpentine Road. The run course is 4km and 7.4km around the Serpentine (lake) on tarmac paths. The bike course is 8 lap loops of South Carriage Drive (road close to traffic).

icon Training Plans

ActiveTrainingWorld have free running and cycling training plans to help you train for this event:


Other Race Information

Race Numbers
Please wear your number pinned to the front of your top on the run and on the back of your top for the bike. Race belts can be used.

Parking and Transport
Use of public transport is advised. Information can be found here.

There are no showers or changing facilities in Hyde Park so come ready to race.

The nearest public toilets are near the start on Serpentine Road and will be open from 7am (cost 20p).

Food and hot drinks will be available at the Serpentine Bar & Kitchen after 8am.
Hyde Park is a pretty nice place to hang out after the race and there are cafes at the eastern end of the Serpentine and at the Lido. If you don't come to this part of Central London much, how about a feed in the atmospheric Lebanese cafes on Edgware Road? Or head south from the park and join the ladies who lunch in Harvey Nic’s!

Withdrawal/number transfer Policy
If you are unable to race you may transfer your number to another person, up to midnight on Monday 13th April. THIS MUST BE AGREED in writing with the race director by this date. To request a transfer, email
Transfer of numbers without approval of the race director can be dangerous if emergency services cannot reach the correct next of kin and also unfair as it can distort the results. Any unapproved number swaps will result in the disqualification of the receiver of the number and a ban from all future Serpentine events for both parties.

ActiveTrainingWorld offers every person who books an event the option to purchase "Refund Protection" which allows them to get a full refund of entry fees in the event of an injury, illness or other reasons specified on the policy. The link to claim your refund will be on your confirmation email along with your booking reference number. Terms & Conditions are here


By entering this event you agree to the below terms and conditions

(1) I declare that I am medically fit to compete & understand that I do so entirely at my own risk.

(2) I understand that I enter the race at my own risk and that no person(s) or organisation(s) will be held responsible for any accident, injury or loss to myself, prior to, during or after the event.

(3) I understand the organisers reserve the right to alter the arrangements and conditions, should circumstances require.

(4) By entering this event, the athlete indicates acceptance of BTF rules.


LOCATION: Hyde Park, Central London, W2 2UH

Location: Hyde Park, London, Central London, W2 2UH