Take on a classic British triathlon at the iconic ATW Grafham Triathlon on Saturday, September 26, 2026, a premier late-season event set in the award-winning venue that has hosted national championships and GB qualifiers. This perfectly organized race offers both Standard and Sprint distances, featuring a clean, clear-water swim in the expansive Grafham Water reservoir, a fast and scenic out-and-back bike course through picturesque villages, and a flat run across the iconic dam wall with incredible crowd support on each lap. Organized by the UK's largest multisport specialist, ATW, the event is renowned for its safe, friendly, and supportive atmosphere, making it an ideal choice for seasoned athletes chasing a personal best and newcomers embarking on their first open-water triathlon. With additional Aquabike and Relay options, and hassle-free transfer policies, the focus remains on your performance and enjoyment in a stunning, traffic-free environment. Whether you're capping your season with a strong performance or ticking off a bucket-list venue, Grafham delivers a professional, rewarding, and unforgettable multisport experience. Secure your Early Bird entry for a September Saturday where every discipline is a pleasure, and your finish line story is one of pure achievement.
Races Offered
Sprint Triathlon
Sep 26, 2026
straighten
Distance —
17 km 5 km
terrain
Type —
Multisports
timer
08:00
Standard Aquabike
Sep 26, 2026
straighten
Distance —
38K
terrain
Type —
Multisports
timer
08:15
Standard Triathlon
Sep 26, 2026
straighten
Distance —
38 km 10 km
terrain
Type —
Multisports
timer
08:15
Weather Overview
These values represent the 3-year monthly averages for September in Huntingdonshire.
Temp (°C)
Feels Like (°C)
thermostat11.8° / 20.1°
wb_sunny9.6° / 17.6°
Wind (km/h)
Humidity (%)
air14.1 /
water_drop76.7%
Temp (°C)
Feels Like (°C)
Wind (km/h)
Humidity (%)
thermostat11.8° / 20.1°
wb_sunny9.6° / 17.6°
air14.1 km/h
water_drop76.7%
About Huntingdonshire
Learn more about the host city, Huntingdonshire.
Huntingdonshire is a local government district in Cambridgeshire, England.
The district had a population of 180,800 at the 2021 census, and has an area of 354.3 square miles (918 km2). The largest towns are St Neots (33,410), Huntingdon (25,428), and St Ives (16,815). The district council is based in Huntingdon.
