Conquer a classic British middle-distance triathlon at the iconic ATW Grafman on Sunday, June 7, 2026. Held at the beautiful Grafham Water, this event has earned its stellar reputation, having hosted national and British championships, and delivers a true "by triathletes, for triathletes" experience. You'll take on a 1900m open-water swim with a unique 'Aussie style' exit, followed by a 90km bike leg on quiet country lanes and a scenic 21km run with stunning views of the reservoir's valve tower. The event is designed for everyone, offering a draft-illegal individual race, a relay option, and an Aquabike challenge for those who want to skip the run.
Enjoy the full weekend experience with on-site camping and accommodation, perfect for bringing your family along to cheer you on. From supportive marshals and well-stocked aid stations to a custom finisher's medal and finish-line goodies, every detail is crafted to help you achieve your goal. Organised by Active Training World, this community-focused event offers a hassle-free transfer policy and supports Alzheimer's Research UK. Whether you're a first-timer or a seasoned competitor aiming for the 9.5-hour cutoff, the Grafman provides the perfect stage to test your limits at one of the UK's most popular middle-distance triathlons.
Races Offered
Middle Distance Aquabike
Jun 07, 2026
straighten
Distance —
91K
terrain
Type —
Multisports
timer
07:00
Middle Distance Triathlon
Jun 07, 2026
straighten
Distance —
90 km 21 km
terrain
Type —
Multisports
timer
07:00
Middle Distance Triathlon Relay
Jun 07, 2026
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Distance —
91 km 21 km
terrain
Type —
Multisports
timer
07:00
Weather History
These values represent the 3-year monthly averages for June in Grafham , Cambridgeshire.
thermostatTemperature
11.9° / 21.4°
wb_sunnyFeels like
9.5° / 18.6°
light_mode
Avg sunshine hours
12h 34m
water_drop
Avg rainfall
1.3 mm
ac_unit
Avg snowfall
—
air
Avg wind speed
14.6 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
69.2%
wb_twilight
Sunrise
04:40
nightlight
Sunset
21:22
Hotels & Places to Stay
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