Half Marathon
Sun 24 Mar 2024 Waltham Cross, Hertfordshire, UK

ATW Run Fest at Lee Valley | Half Marathon

Smash your personal best on a traffic-free, flat and fast course from the White Water Centre and into surrounding beautiful regional parkland with a custom-designed medal for finishers.

Enter now
  • Sun 24 Mar 2024
Lee Valley White Water Centre, Waltham Cross

Half Marathon



Age 17 & over

  • 13.1 miles road running + 79 ft ascent


The Lee Valley Regional Park is a picturesque country park and now you have the chance to compete here!

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

These races fill up quickly so enter now to avoid missing out!



  • Hugely popular year after year
  • Well marked course
  • Genuine PB potential
  • Supportive marshals 
  • 5-star runner reviews
  • Custom designed medal 
  • Finish line snacks and goodies

This event is part of ATW Run Fest at Lee Valley.

Event details

  • All fitness levels
  • Event village
  • Free venue entry
  • Newcomers
  • Spectators

  • Cafe
  • Paid parking
  • Park
  • Toilets

Event HQ

Lee Valley White Water Centre
Station Road
Waltham Cross



Parking is available at the Lee Valley Regional Park, parking charges may apply. There is no parking at the White Water Centre.

By rail

Lee Valley is a beautiful regional park, just a 40 minute train ride from London. Waltham Cross station is a short walk away.

  • 2 laps
  • Distance markers
  • Flat
  • Marshals
  • PB
  • Traffic free
  • Water stations
  • Wave start
  • Way markers


The route is flat, fast and traffic-free offering genuine PB potential.

The half marathon is a two-loop route which heads out into the beautiful River Lee country park that surrounds the White Water Centre. 


Cut off time

3 hours.


This road race is licenced by UK Athletics which means the wearing of headphones is strictly prohibited except bone conductors which leave the ear open to marshal instructions, traffic or emergency announcements.

  • Public transport links
  • Recycling
  • Sustainability policy

Here are the ways this event cares for the environment:


  • Recycling bins
  • Recycling gets separated from general waste
  • Finish line water bottles made from recycled material
  • Refill taps are provided so participants can bring their own bottle and fill up during the event
  • The choice of paper cups at water stations
  • Signage including course marking attached with reusable garden wire instead of plastic cable ties
  • 'Dynamic bib assignment’ removes the need for envelopes, sticker labels and excess waste
  • Bike racking is provided to promote cycling to the events

  • Goody bag
  • Medal
  • Post-race meal


  • All finishers will receive a custom-made medal at the end of the race
  • Finish line goodies

Optional extras

  • ICE Band (Β£22.94)

  • Age 17 & over
  • Entries open
  • Enter online
Enter now

Entry fees

Entry fee (Unaffiliated)


Entry fee (Affiliated)


Another great event. Pre race information was sent out in plenty of time. From the marshall guiding us to the parking right through to the team handing out the medals, water and goodies at the end everything really was spot on. The route was scenic and flat - a bonus! Very friendly event staff. Couldn't fault the occasion. Many thanks again to ATW. Deborah M

Really great course and super easy logistics either by car (free parking and plenty of it) of train only a 10 min walk. Beautiful setting, well marshalled and sign posted and lovely event crew. Pas B

A well organised event, was my first official half and I was impressed with the scenic route, wonderful marshals and registration process. Colin K

My 1st time. Thought everything was well organised. Everyone involved was so friendly and helpful.There were water stations and at the end more drinks and treats. Great medal. Definitely value for money. Great atmosphere. I would recommend this to other runners and I’m looking forward to doing it again. Karen S

Well organised. Great support and PB potential is high here. Nice 2 lap event so good for spectators. Went into the race as a training event for a full and ended up close to a PB without realising. Decent medal and good facilities at the white water centre to eat and drink after. Gemma P

Other races at event

  • Sun 24 Mar
  • #1 of 2
Lee Valley White Water Centre, Waltham Cross




Age 15 & over

  • 10 km road running + 39 ft ascent