www.onerace.events

The One for the Planet

location_on

Dorney Reach, South East, United Kingdom

calendar_today 14 Jun, 2026

kayaking Multisports

directions_run Running

pool Water sports

language Official Website

sell £25.00 – £80.00

About the Event

One finisher medal. One tree planted. One participant. The OneRace Triathlon returns to Dorney Lake, Windsor, on Sunday, June 14, 2026. This multisport festival offers triathlon, duathlon, aquabike, aquathlon, swim (750 m, 1500 m, 3000 m), and run (5 km, 10 km, 15 km). Flat, smooth‑surfaced course. Shopping village, food and drink stands, DJ, and Olympic bridge views for spectators.

Triathlon
Standard (1500m/40k/10k) 8:00am • Sprint (750m/20k/5k) 8:45am • Super Sprint (400m/10k/2.5k) 9:30am

Duathlon / Aquabike / Aquathlon
Same distance options (Standard, Sprint, Super Sprint) • Staggered start times

Swim Only
3000m, 1500m, 750m • 10:15am start

Run Only
15km, 10km, 5km • 11:30am start

Sustainability Promise:

Handcrafted wooden finisher medals
"One participant, one tree" planted for every entry
Powered by Climategames — download the app, sync your wearable, and join the event to remove plastic from the ocean. Only participants who download Climategames can make their activity matter for the planet.

What Your Entry Includes:

Finisher medal
Chip timing
Refreshments

Logistics:

Race pack collection on event day from 6:45 AM (timing chip, bib number, bike/helmet stickers, swim hat). No postal delivery.
Transition opens at 6:45 AM. Participants must show event number and bike sticker on seat post.
Transition area open for triathlon/multisport; for run‑only events, bag drop available via bib tear‑off strip.
Water at start/finish for refill. Run routes only have water stations on course — participants must carry own hydration for swim/bike legs.
Medical cover on site. Food caterer on site (pre‑ and post‑race). Free portable toilets in event village (none on course). No changing rooms or showers.
Spectators welcome anywhere in start/finish area.
No dogs (except registered medical assistance dogs with prior approval).
No buggies, pushchairs, or strollers due to terrain. Wheelchairs permitted — contact organizers before entry.
No headphones or earphones of any type permitted.
Race deferrals allowed until registration closes (Friday 12:00 PM before event). Admin fee applies.
On‑the‑day registration may be available.

Location: Dorney Lake Boathouse, Court Ln, Dorney, Windsor, SL4 6QP. What3Words: ///cheer.spins.rails

Races Offered

Standard Aquabike

Jun 14, 2026

straighten

Distance — 1.5km 40km

terrain

Type — Multisports, Running

timer

08:00

sell

£65.00

Standard Aquathlon

Jun 14, 2026

straighten

Distance — 1.5km 10km

terrain

Type — Multisports, Running

timer

08:00

sell

£65.00

Standard Triathlon

Jun 14, 2026

straighten

Distance — 1.5km 40 km 10 km

terrain

Type — Multisports, Running

timer

08:00

sell

£80.00

Standard Duathlon

Jun 14, 2026

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Distance — 40 km 15 km

terrain

Type — Multisports, Running

timer

08:15

sell

£65.00

Sprint Aquabike

Jun 14, 2026

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Distance — 0.75km 20km

terrain

Type — Multisports, Running

timer

08:45

sell

£60.00

Sprint Aquathlon

Jun 14, 2026

straighten

Distance — 0.75km 5km

terrain

Type — Multisports, Running

timer

08:45

sell

£60.00

Sprint Triathlon

Jun 14, 2026

straighten

Distance — 0.75km 20 km 5 km

terrain

Type — Multisports, Running

timer

08:45

sell

£70.00

Sprint Duathlon

Jun 14, 2026

straighten

Distance — 20 km 10 km

terrain

Type — Multisports, Running

timer

09:00

sell

£60.00

Super Sprint Aquabike

Jun 14, 2026

straighten

Distance — 0.4K 10K

terrain

Type — Multisports, Running

timer

09:30

sell

£60.00

Super Sprint Aquathlon

Jun 14, 2026

straighten

Distance — 0.4K 2.5K

terrain

Type — Multisports, Running

timer

09:30

sell

£60.00

Super Sprint Triathlon

Jun 14, 2026

straighten

Distance — 0.4km 10 km 2.5 km

terrain

Type — Multisports, Running

timer

09:30

sell

£60.00

Super Sprint Duathlon

Jun 14, 2026

straighten

Distance — 10 km 5 km

terrain

Type — Multisports, Running

timer

09:45

sell

£60.00

Swim 1500m

Jun 14, 2026

straighten

Distance — 1.5K

terrain

Type — Multisports, Running

timer

10:15

sell

£30.00

Swim 3000m

Jun 14, 2026

straighten

Distance — 3K

terrain

Type — Multisports, Running

timer

10:15

sell

£40.00

Swim 750m

Jun 14, 2026

straighten

Distance — 0.75K

terrain

Type — Multisports, Running

timer

10:15

sell

£25.00

10K run

Jun 14, 2026

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Distance — 10K

terrain

Type — Multisports, Running

timer

11:30

sell

£26.00

15K run

Jun 14, 2026

straighten

Distance — 15K

terrain

Type — Multisports, Running

timer

11:30

sell

£30.00

5K run

Jun 14, 2026

straighten

Distance — 5K

terrain

Type — Multisports, Running

timer

11:30

sell

£26.0

Weather History

These values represent the 3-year monthly averages for June in Dorney Reach.

thermostat Temperature

12.0° / 22.2°

wb_sunny Feels like

10.0° / 19.7°

light_mode Avg sunshine hours

12h 51m

water_drop Avg rainfall

1.1 mm

ac_unit Avg snowfall

—

air Avg wind speed

12.9 km/h (Gentle breeze)

opacity Sweat loss rate

Moderate

terrain Course conditions

Firm and slightly soft

sunny Max UV Index

Moderate (5.6)

humidity_mid Humidity

68.0%

wb_twilight Sunrise

04:46

nightlight Sunset

21:19

About Dorney Reach

Learn more about the host city, Dorney Reach.

Dorney is a village and civil parish in Buckinghamshire, England. It borders the River Thames to the west and south, and is bisected by the Jubilee River. In 2011 it had a population of 752. It is 2.3 miles (3.7 km) west of neighbouring Eton, which is a slightly larger parish.

Hotels & Places to Stay

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The One for the Planet

About the Event

Races Offered

Standard Aquabike

Standard Aquathlon

Standard Triathlon

Standard Duathlon

Sprint Aquabike

Sprint Aquathlon

Sprint Triathlon

Sprint Duathlon

Super Sprint Aquabike

Super Sprint Aquathlon

Super Sprint Triathlon

Super Sprint Duathlon

Swim 1500m

Swim 3000m

Swim 750m

10K run

15K run

5K run

Weather History

About Dorney Reach

Hotels & Places to Stay

Runner Reviews

No reviews yet

Nearby Races

ATW Midweek Dorney Triathlon - May

ATW Dorney Triathlon - June

ATW Midweek Dorney Triathlon - July

ATW Dorney Triathlon - July

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Run Manatee - Rye Preserve 5K -2026

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