5K
Sat 9 May 2026 Windsor, Buckinghamshire, UK

The All Nations Triathlon, 5K, 10K and Half Marathon Run | 5K

The All Nations 5K run is a chance to don your country colours and feel like you are running for your country! If you love running or want to get together with others, then definitely take part!

Enter now
  • Sat 9 May 2026
Dorney Lake, Windsor
5K

08:45

Age 11 & over

£25-£30

  • 5 km road running

Event overview

Experience a vibrant day of outdoor racing that brings athletes together across multiple disciplines, from a fast, exciting super sprint triathlon to classic road running distances.

Whether you’re new to multisport or chasing a personal best, choose your challenge with 5K, 10K or half marathon races in an energetic, supportive event atmosphere.

Highlights

  • Multiple race options in one day, from a super sprint triathlon to a half marathon
  • Ideal for first-timers, club athletes and experienced racers alike
  • Well-organised, friendly event with a supportive atmosphere throughout
  • Opportunity to race, spectate or cheer across several disciplines
  • Clearly structured schedule making it easy to plan your race day
  • Finisher medals and race-day rewards across all events
  • A celebration of multisport and running, bringing athletes together at the famous Olympic venue

This event is part of The All Nations Triathlon, 5K, 10K and Half Marathon Run.

Event video

  • Average fitness
  • Beginner-friendly
  • Buggy friendly
  • Dogs allowed at venue
  • Event village
  • Families
  • Spectators
  • Venue accessible

Timetable

  • 07:15-07:45 | Recommended arrival time
  • 08:15 | Half Marathon
  • 08:45 | 5K and 10K
  • 09:45 | Bikes must be racked by this time
  • 10:15 | Triathlon events begin

Team entries

Get as many friends, family or colleagues together and take part as a team. You are not required to stay together and each person will receive their own time however it's just fun to participate under a team name.

Wheelchairs

The routes are suitable for wheelchair users.

Dogs

Dogs may run with their owners in the 5K, 10K or Half Marathon running events but not the triathlon events. Please ensure your dog is on a short lead/harness and that you are careful on the course and respect other runners and park users.

  • Cut off time
  • First aid
  • Flat
  • Headphones allowed
  • Marshals
  • Navigation not required
  • Traffic free
  • Water stations
  • Way markers
  • GPX available

GPX route

The route is displayed on the map above.

Route

  • The course is path
  • The course is flat
  • 5K turns at the far end of the lake
  • 10K does a full loop before turning back
  • The Half Marathon does additional sections of Dorney Lake
  • Buggies are OK
  • Wheelchair friendly
  • Note the course may be altered at any point up to event day if necessary

  • Cafe
  • Changing facilities
  • Free parking
  • Park
  • Secure bag storage
  • Showers
  • Toilets

Event HQ

Dorney Lake
Off Court Lane, Lake End Road
Windsor
Buckinghamshire
SL4 6FJ
UK

Parking

Parking is the main carparking by the clubhouse. This is to the left when you get to the end of the lake.

By rail

If travelling by train the main stations for Dorney Lake are Slough (Paddington line) and Windsor and Eton Riverside (from Waterloo) but is also near Burnham, Taplow, Maidenhead and Windsor and Eton Central (branch of Paddington line). From these stations you can get a taxi, or if you have a bike, you can ride to the venue. 

  • Chip timing
  • Drinks
  • Medal
  • Snacks
  • Trophy

Included

  • Awesome spinning medal you will love to add to your collection
  • Electronic chip timing and instant race results
  • Results texted to your mobile phone as you cross the line (small fee)
  • Trophies for winners
  • Snacks, drinks and other goodies for all entrants
  • Stunning clubhouse and cafe

Well here it was – the first triathlon race of the season for me. This is now the second time I have taken part in this event and I can see it becoming the first event and a regular thing for me each season. Danny M

Good event in a fantastic location (2012 Olympic site), cold water but perfect TRI courses for beginners as it is flat for the bike and running parts. Had a great day and will probably do it again next year... Patrice B

First time for me in open water. Easy access to water and a good transition zone, but a bit boring with the 4 bike loop, nice and flat run. Brian R

Reviews thanks to RaceCheck

  • Age 11 & over
  • Entries open
  • Collect race pack
  • Enter on day
  • Enter online

Entry fees

Entry fee

£25.00

Entry fee (on the day)

£30.00

Enter now

Other races at event

  • Sat 9 May
  • #2 of 4
Dorney Lake, Windsor
10K

08:45

Age 15 & over

£25-£30

  • 10 km road running
  • Sat 9 May
  • #3 of 4
Dorney Lake, Windsor
Half Marathon

08:15

Age 17 & over

£30-£35

  • 13.1 miles road running
  • Sat 9 May
  • #4 of 4
Dorney Lake, Windsor
The All Nations Triathlon

10:15

Age 15 & over

£60

  • 400 m pool swimming
  • 20 km road cycling
  • 5 km road running

Other South East events

Other UK events

4 steps to wellbeing
Sleep well

A good night's sleep is an essential foundation for a healthy lifestyle, effective training and weight control.

Train slow

Low-intensity training is easier for you, reduces the risk of injury and helps builds an efficient aerobic system.

Eat natural

Cut out sugar & junk food, reduce carbs, eat natural foods and train your body to burn fat for fuel.

Get outdoors

Fresh air, natural light and reconnecting with nature all help to improve mental and physical wellbeing.