Complete Calendar
FIND YOUR NEXT ONERACE EVENT
Browse the complete running, multisport and run club calendar. Filter by discipline, entry status, event name or location, then open a race page for full details.
OneRace organises fast, friendly, traffic-free running events across London and the South East. Our One in the Park series brings 5K, 10K, 10 mile and half marathon races to the capital's most iconic green spaces — Regent's Park, Hyde Park, Greenwich Park, Victoria Park, Richmond Park and Battersea Park.
Every race is chip timed, fully marked and marshalled, with pacers at selected events, water on the course, a finisher's medal and race photography included. Whether it's your first 5K, a Sunday-morning 10K PB attempt or your next half marathon, there's a London start line here for you.
RACES BY DISTANCE
- London 5K races — compare confirmed dates and park venues
- London 10K races — browse the current 10K calendar
- 10 mile races — view confirmed 10 mile options
- London half marathons — compare confirmed London editions
Escape the city streets on OneRace trail and canal-side routes, including the Grand Union Canal Half Marathon. Soft ground, big skies and quiet miles — with the same chip timing, marshalling and finisher's medal as our park races.
Trail events suit road runners looking for a new challenge as much as seasoned off-road racers, with clearly marked courses and generous cut-offs.
RACES BY DISTANCE
- Canal half marathons — flat, scenic 13.1 miles on the towpath
- Trail 10K races — off-road loops close to London
OneRace triathlons cover everything from first-timer sprints to standard distance racing, plus aquathlon, aquabike and duathlon options for athletes building towards a full multisport day.
Expect safe, well-supervised swims, marshalled bike courses and fast run legs, with British Triathlon standard race organisation throughout.
RACES BY DISTANCE
- Triathlons near London — compare confirmed multisport events
- Duathlon & aquathlon — run-bike-run and swim-run formats
Run with OneRace Run Club. Browse published sessions for dates, locations, distances and meeting details, then open a session page to find out more.
No booking or registration is needed. Check the published meeting point and start time before heading out.
RUN CLUB SESSIONS
- All run club sessions — view dates, locations and meeting points
COMPARE TRIATHLON DISTANCES
Compare the events below, one row per race format. Only confirmed course distances are shown.
| Event / Date | Format | Swim (m) | Bike (km) | Run (km) |
|---|---|---|---|---|
| One for the Planet - Dorney Lake 16 May 2027 · Dorney | Standard Triathlon | 1,500 m | 40 km | 10 km |
| One for the Planet - Dorney Lake 16 May 2027 · Dorney | Sprint Triathlon | 750 m | 20 km | 5 km |
| One for the Planet - Dorney Lake 16 May 2027 · Dorney | Super Sprint Triathlon | 400 m | 10 km | 2.5 km |
| One on the River - Marlow 30 May 2027 · Higginson Park, Marlow | Middle Triathlon | Not confirmed | Not confirmed | Not confirmed |
| One on the River - Marlow 30 May 2027 · Higginson Park, Marlow | Standard Triathlon | Not confirmed | Not confirmed | Not confirmed |
| One on the River - Marlow 30 May 2027 · Higginson Park, Marlow | Sprint Triathlon | Not confirmed | Not confirmed | Not confirmed |
| One on the River - Marlow 11 Jul 2027 · Higginson Park, Marlow | Middle Triathlon | Not confirmed | Not confirmed | Not confirmed |
| One on the River - Marlow 11 Jul 2027 · Higginson Park, Marlow | Standard Triathlon | Not confirmed | Not confirmed | Not confirmed |
| One on the River - Marlow 11 Jul 2027 · Higginson Park, Marlow | Sprint Triathlon | Not confirmed | Not confirmed | Not confirmed |
| One on the Lake - Dorney 5 Sep 2027 · Dorney Lake | Formats not confirmed | Not confirmed | Not confirmed | Not confirmed |
London Running Events
5K, 10K, 10 MILE & HALF MARATHON RACES IN LONDON
OneRace organises chip-timed running events across London's most iconic royal parks and green spaces. Our race calendar covers 5K and 10K races in Regent's Park, Hyde Park, Greenwich Park and Battersea Park, plus 10 mile and half marathon distances in Victoria Park and Richmond Park.
Use the dedicated London 5K, London 10K and half marathon pages to compare confirmed dates and venues. Each event page shows the approved race-day information currently available for that edition.
For multisport outside the capital, browse triathlons near London. Locations are shown by their actual town or venue so athletes can make an informed choice before entering.