Lee Valley Half Marathon & 10K – 27th March 2022

Lee Valley
Half Marathon & 10k 


The Lee Valley White Water Centre is a stunning venue in Hertfordshire and is surrounded by a picturesque regional park.

The event will host a 10K and a half marathon. Both events start and finish at the White Water Centre before heading out to the beautiful regional park that surrounds the centre.

The course is traffic free, flat and fast so not only can you smash your personal best but you can also enjoy fantastic scenery whilst you are doing it!

We will adhere to any new Covid-19 restrictions regarding social distancing if they come into place. Please watch our video if you have any concerns; Covid-19 Safety at ActiveTrainingWorld Running and Triathlon Events

This is race is always extremely popular so enter now to avoid missing out!

  • Location: Lee Valley White Water Centre, Station Rd, Waltham Cross EN9 1AB
  • Start times: From 09:00am.
  • Distances: 13.1 miles & 10K
  • Minimum Age: Half Marathon – 17yrs | 10K -15yrs (on 27/03/2022)
  • Activity: Running

  • Open to: Solo participants

  • Entry Fee: From £22 per person (Details below)

  • UKA License No: Applied for
  • Refunds: Active Training World does not offer refunds, transfers or deferrals for this event or any events listed on the website. If you are unable to attend due to illness, injury, family bereavement or jury service, you will only be eligible for a transfer or credit note on production of official evidence: Positive Covid-19 test result, Doctor’s note or equivalent.
  • Event Cancellation: If the event should have to be cancelled due to reasons beyond ATW’s control (for example – but not limited to – adverse weather, local or national lockdown) entrants will be given a credit note for the value of their entry fee (minus the booking fee) to be used on any ATW event.
  • Additional Fees: A 6% booking fee will be added at the checkout
  • Event Organiser: Active Training World
  • Organiser Email: events@activetrainingworld.co.uk

As a memento of the day to celebrate your achievements  – you can now purchase an Event T-Shirt for JUST £10!

Available in both mens & womens sizes S, M, L & XL

Add to your cart at checkout!











Race numbers will be collected at the the event venue on the morning of the race.

Registration open from 07:30am

There will be an online race briefing for you to watch before the event. It is mandatory to have watched this as there will no pre-race briefing on the day.

The detailed pre-race information will be sent you by email in the week leading up to the event.

Please arrive in sufficient time to collect your race number but do not arrive before the designated time detailed above.


A beautiful, picturesque course that is flat and fast

The race starts and finishes in the White Water Centre

Lee Valley Half marathon Route Map

Lee Valley 10k Route Map

And after completing your distance, you will be congratulated with a custom event medal. The event will also be chip timed so you will get an accurate time for your race.

10K – Single lap | Half Marathon – 2 laps on pathways

We actively welcome support and involvement from local communities, businesses and individuals. If you would like to find out more about marshalling, sponsorship or group bookings please contact us at the address below.

Due to current restrictions all event staff and volunteers will need to confirm that they have not been unwell in the 14 days leading up to the event. This also applies to competitors and spectators. For this reason we are discouraging spectators to attend the event. If you would like more info on this event please use the email address below:



Custom designed medal for all finishers!
Add a medal insert to commemorate your time; whether it’s your first race or a new PB! Available to purchase for an additional £8.
Simply add MEDAL INSERT on your registration form and you’ll be sent the insert in the mail shortly after race day, for you to apply to your medal and display proudly!

There will be a prizegiving to the top 3 male and female finishers in each race on the day

There will be full results on the chip timing website both overall and by category.

It is important that you are fit to run and have not experienced any Covid-19 symptoms in the 14 days leading up to the event.

Race Numbers
Please wear your number pinned to the front of your vest.

Free Parking is available at Lee Valley Regional Park. There is no parking at the White Water Centre.

Changing and Bag Storage
We will not be providing a changing area, therefore please come changed and ready to race. There will be no designated baggage area for this event as per UKA guidance.

Toilets will be provided for the event.

Water Station
There will be 2 water stations available per lap on the route. There will be water available, in cups, self-service style, at the finish.

ActiveTrainingWorld do not offer transfers or deferrals for this event or any events listed on the website. If you are unable to attend due to illness, injury, family bereavement, jury service you will only be eligible for a refund on production of official evidence: Positive Covid-19 test result, Doctor’s note, Death Certificate etc.

Time Limit
The Run Fest at Lee Valley Half Marathon and 10K have a maximum time restriction of 3 hours, after which there may not be marshals and time keepers available.

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

Your details will kept in accordance with the Active Training World Privacy Policy

Your name, date of birth and email details will be onto the chip timing company. Personal details will be deleted 1 week after the event.

Where specified on the booking form any medical information will be passed onto the medical team present at the event. 


1) I am over the age of 15 on the day of the event. 

2)  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) I agree that I will not use an audio device such as MP3 or ipod as it is against UKA rules.

4)  By entering this event, I accept UKA rules.


The event is being officially timed by Event Chip Timing and the results will be available on the day at http://results.eventchiptiming.com

Ticket Details

    • If this is your first registration on our new booking platform but had an ATW account previously, your old ATW log in details are now invalid and a new account will be created for you when you book your first event without logging in.
    • If you are booking more than 1 place, please ensure that you complete the individual details for each attendee accurately answering all the questions on their behalf.
    • Please supply your estimated run time in minutes/seconds (e.g. 12.34)
  • Prices do not include 6% booking fee. This will be added at checkout.
Details Price Qty
Half Marathon UKA Unaffilitated £29.00 (GBP)*  
Half Marathon UKA Affliated £27.00 (GBP)*  
10K UKA Affilitated £20.00 (GBP)*  
10K Unaffilitated £22.00 (GBP)*  

Price does not include booking fee

Upcoming Events