Runs, swims, duathlons & triathlons
ATW Events caters to athletes of all levels, from beginners to experienced competitors. They provide well-organized, chip-timed events that support local communities and charities.
- Running events - from fun runs to festivals including 5K runs, 10K runs and half marathons
- Triathlons - including the ATW Grafman & ATW Odyssey Triathlons
- Duathlons & aquabikes - including the Sprint Duathlon European Qualifier event
ATW events in 2025
- Sat 3 May
- £57-£77
ATW Mallory Race Circuit 50K/100K - Incorporating The British and BMAF 50K/100K Championships
Get ready for the challenge of a lifetime at the Mallory Park 50K or 100K race! A unique and thrilling chance to race on the same legendary motor racing circuit that once hosted a Formula 1 event!
- 50K ultra run
- 100K ultra run
- Sat 3 May
- £24-£32
The Livingston Relays
The Livingston Relays is a prominent road relay event in the Midlands over a 3-mile loop of the racing circuit. Mens, Womens, U15 Boys and U15 Girls categories and prizes.
- 3 miles road running
- Sat 3 May
- £25-£27
ATW Mallory Race Circuit 10 Mile Road Race
Incorporating the British Masters, English Masters and Road Runners Club 10 Mile Championships. Ready to take your running to the next level?
- 10 miles road running
- Sun 4 May
- £53-£94
ATW St Neots Triathlon | Race 1
Stunning riverside venue! Swim in the beautiful River Ouse, cycle through scenic villages and run around Riverside Park in a triathlon or aquabike event of your choice.
- Super sprint triathlon
- Sprint triathlon
- Olympic triathlon
- Standard aquabike
- Sun 11 May
- £44-£49
HSV Sprint Triathlon & Aquabike
This is a great race for all standards, from the absolute beginner right through to the seasoned triathlete. The course is fast, flat and has great PB potential.
- Sprint triathlon
- Sprint aquabike
- Sat 17 - Sun 18 May
- £68-£140
ATW Box End Triathlon
A choice of multi-sports events including triathlon, relay triathlon and aquabike at a stunning watersports venue with immaculate water quality, scenic routes, a custom designed medal and much more.
- Sprint triathlon
- Sprint aquabike
- Olympic triathlon
- Standard aquabike
- Half Ironman
- + 1 more race
- Sun 25 May
- £58-£120
Dorney Triathlon | May
Take on this multi-activity event and take the opportunity to race around this unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.
- Super sprint triathlon
- Sprint triathlon
- Olympic triathlon
- Sprint aquabike
- Standard aquabike
- Sun 25 May
- £27-£35
ATW Chiltern Half Marathon & 10K
Get involved in this exhilarating Half Marathon or 10K in the stunning Chiltern Hills! This Area of Outstanding Natural Beauty offers the perfect mix of challenging climbs rewarding descents.
- 10K run
- Half marathon
- Sun 25 May
- £80
Dorney Lake Draft-Legal Triathlon
Incorporating Sprint Triathlon 2026 World Championships Qualifier! Dorney Lake Events provides you with an opportunity to race like an elite around this unique and inspiring Olympic venue.
- 750 m lake swimming
- 19 km road cycling
- 5 km road running
- Wed 28 May
- £58-£78
Midweek Dorney Triathlon | May
Take on this multi-activity event and take the opportunity to race around this unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.
- Super sprint triathlon
- Sprint triathlon
- Sprint aquabike
- Sun 1 Jun
- £145-£186
ATW Grafman Middle Distance Triathlon & Aquabike
One of the country’s most popular middle distance swim-bike-run events, delivered by triathletes for triathletes, at the beautiful and iconic Grafham Water.
- Half Ironman
- Standard aquabike
- Sat 7 Jun
- £58-£120
Dorney Triathlon | June
Take on a multi-activity or distance event and take the opportunity to race around this unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.
- Super sprint triathlon
- Sprint triathlon
- Olympic triathlon
- Sprint aquabike
- Standard aquabike
- Sun 8 Jun
- £10-£39
ATW St Albans Half Marathon, 5K & Fun Run
A community-focused event, ATW St Albans Half Marathon aims to raise money for local charities and organisations as well as put on a great day out for all the family, delivered by runners for runners.
- Fun run
- 5K run
- Half marathon
- Challenge walk
- Sun 15 Jun
- £62-£115
ATW Stewartby Lake Triathlon & Aquabike
Located at the Stewartby Sailing Club this venue is perfect for triathlon and aquabike and was host to a sold-out GB team qualifier event in 2023, with probably the fastest bike leg in the country!
- Sprint triathlon
- Olympic triathlon
- Sprint aquabike
- Standard aquabike
- Sat 28 Jun
- £18-£29
ATW Childrens Triathlon Mallory Park
Mallory Park Junior Triathlon: Where Dreams Take Flight! Nurturing the next generation of triathletes, providing a safe and exhilarating environment for children to discover the thrill of multisports.
- Kids triathlon 5
- Sun 29 Jun
- £48-£98
ATW Triathlon | Mallory Park
Mallory Park Triathlon Extravaganza: A Traffic-Free Triumph! A thrilling and safe circuit nestled in picturesque surroundings, boasting its own self-enclosed swim lake.
- Super sprint triathlon
- Sprint triathlon
- Super sprint aquabike
- Sprint aquabike
- Wed 2 Jul
- £58-£78
Midweek Dorney Triathlon | July
Take on this multi-activity event and take the opportunity to race around this unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.
- Super sprint triathlon
- Sprint triathlon
- Sprint aquabike
- Sat 5 Jul
- £155-£295
ATW Odyssey Triathlon
Complete your own Odyssey on a journey of self-discovery in the Cambridgeshire countryside featuring a swim in the River Ouse, a scenic ride and a run around the beautiful town of St Neots.
- Ironman
- Half Ironman
- Sat 5 Jul
- £110-£250
ATW Odyssey Aquabike
Complete your own Odyssey on a journey of self-discovery in the Cambridgeshire countryside comprising a swim in the meandering River Ouse followed by a cycle around scenic countryside.
- Long aquabike
- Middle aquabike
- Sat 5 Jul
- £50-£100
ATW Odyssey12
The ATW Odyssey 12hr Run is more than just a running event, its a journey of self-discovery through the beautiful multi-terrain footpaths around St Neots.
- 12 hrs trail running
- Sun 6 Jul
- £53-£94
ATW St Neots Triathlon | Race 2
Stunning riverside venue! Swim in the beautiful River Ouse, cycle through scenic villages and run around Riverside Park in a triathlon or aquabike event of your choice.
- Super sprint triathlon
- Sprint triathlon
- Olympic triathlon
- Standard aquabike
- Sprint aquabike
- Sun 6 Jul
- £55-£85
ATW Bristol Triathlon
ATW presents the Bristol Triathlon, one of the UK's most-popular 'closed-road' triathlon events, in a vibrant city known for its culture, creativity and green spaces.
- Sprint triathlon
- Sprint aquabike
- Olympic triathlon
- Standard aquabike
- Sun 13 Jul
- £58-£120
Dorney Triathlon | July
Take on a multi-activity or distance event and take the opportunity to race around this unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.
- Super sprint triathlon
- Sprint triathlon
- Olympic triathlon
- Sprint aquabike
- Standard aquabike
- Sun 20 Jul
- £27-£29
ATW St Albans Summer 10K
ATW brings you the St Albans Summer 10K with a twist! Flat, fast and chip-timed with pacers to help you achieve a PB, plus buzzing event village for all the family with music, play zone and ice cream.
- 10 km road running
- Sat 9 Aug
- £40-£120
Dorney Triathlon | August
Take on a multi-activity or distance event and take the opportunity to race around this unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.
- Super sprint triathlon
- Sprint triathlon
- Olympic triathlon
- Sprint aquabike
- Standard aquabike
- + 1 more race
- Sun 10 Aug
- £53-£94
ATW St Neots Triathlon | Race 3
Stunning riverside venue! Swim in the beautiful River Ouse, cycle through scenic villages and run around Riverside Park in a triathlon or aquabike event of your choice.
- Super sprint triathlon
- Sprint triathlon
- Olympic triathlon
- Standard aquabike
- Sun 17 Aug
- £53-£95
ATW Oundle Triathlon
ATW is the largest triathlon organiser in the UK and is bringing you the Oundle Triathlon! It doesn’t matter if you are an experienced triathlete or this is your very first attempt at swim-bike-run.
- Super sprint triathlon
- Sprint triathlon
- Sprint aquabike
- Sun 17 Aug
- £16-£28
ATW Oundle Children’s Triathlon
ATW is the largest triathlon organiser in the UK and is bringing you the Oundle Childrens Triathlon! Ideal for all levels including very first attempts at triathlon.
- Kids triathlon 5
- Wed 27 Aug
- £58-£78
Midweek Dorney Triathlon | August
Take on a multi-activity or distance event and take the opportunity to race around this unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.
- Super sprint triathlon
- Sprint triathlon
- Sprint aquabike
- Sun 31 Aug
- £44-£49
HSV Sprint Triathlon & Aquabike
This is a great race for all standards, from the absolute beginner right through to the seasoned triathlete. The course is fast, flat and has great PB potential.
- Sprint triathlon
- Sprint aquabike
- Sat 6 - Sun 7 Sep
- £10-£40
ATW Bedford Running Festival
More than just a running race! Join thousands at Bedfordshire’s most popular weekend of running with festival magic, live music, bar, yoga, kids zone, street food, outdoor cinema and fun fair!
- Fun run
- 5K run
- 10K run
- Half marathon 2
- Sat 13 Sep
- £73-£115
ATW Grafham Triathlon
Get involved in this Grafham Triathlon, brought to you by the largest triathlon organiser in the UK!
- Sprint triathlon
- Olympic triathlon
- Standard aquabike
- Sun 21 Sep
- £73-£175
ATW Big East & Maldon Triathlon
The Big East and Maldon Triathlon is brought to you by the largest triathlon organiser in the UK! A great experience featuring a tidal river swim.
- Sprint triathlon
- Olympic triathlon
- Standard aquabike
- Half Ironman
- Middle aquabike
- Sat 27 Sep
- £58-£120
Dorney Triathlon | September
Take on a multi-activity or distance event and take the opportunity to race around this unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.
- Super sprint triathlon
- Sprint triathlon
- Olympic triathlon
- Sprint aquabike
- Standard aquabike
- Sun 28 Sep
- FREE-£36
ATW Welwyn Half Marathon & Fun Run
The popular Welwyn Half Marathon starts and finishes on the impressive 400m athletics track at Gosling Sports Park with an ideal, traffic-free, disused railway line in between.
- Fun run
- Half marathon
- 10K run
- Sun 12 Oct
- £53-£78
ATW Holdenby House Duathlon
Based in the grounds of the 2,000 acre Holdenby Estate, the traffic-free run lap follows a scenic trail and the rolling bike course enjoys fast-riding country roads.
- Sprint duathlon
- Standard duathlon
- Sun 12 Oct
- £17-£32
ATW Holdenby House Trail & Canicross
The trail goes through the grounds of the 2,000 acre Holdenby Estate and on surrounding farmland with fantastic views of the country house, finishing through the iconic arches that adorn the grounds.
- CaniCross
- 5K run
- 10K run
- Half marathon
- Sun 12 Oct
- £17-£24
Love Luton RunFest
Love Luton is delighted to host the 12th running event for the town. The races will start and finish in Luton town centre and head through award-winning parks on traffic-free, closed roads.
- 5K run
- 10K run
- Sun 26 Oct
- £53-£78
ATW Grafham Duathlon
Join ATW, the largest multisport organiser in the UK, at the iconic Grafham Water - a venue that has been used for award-winning events, national championships and GB qualifier races.
- Sprint duathlon
- Standard duathlon
- Sun 9 Nov
- £47-£88
Dorney Duathlon - November
Take on a Super Sprint, Sprint or Standard distance and take the opportunity to race around this unique and inspiring Olympic venue!!
- Super sprint duathlon
- Sprint duathlon
- Standard duathlon
- Sun 23 Nov
- £19-£35
ATW Wendover Woods Trail Run & Canicross
Set in the stunning Wendover Woods, this is the perfect opportunity to challenge yourself on scenic trails surrounded by beautiful woodland. Enjoy the fresh air, stunning views, and rewarding trails.
- 5K run
- CaniCross
- 10K run
- Half marathon
- Sun 7 Dec
- £30-£35
ATW Grafham Water | Trail & Canicross
The most scenic running event in Cambridgeshire! You are invited to the beautiful Grafham Water to tackle a scenic 10-mile trail run that circumnavigates the reservoir.
- 10 miler
- CaniCross