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 2025/26
- Sun 15 Jun
- £68-£120
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
- £20-£31
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
- £135-£225
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 + 0 ft ascent
- Sun 6 Jul
- £58-£120
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
- £75-£125
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
- Sat 19 Jul
- £265-£295
Castle To Coast Triathlon
Swim, bike, run your way from Windsor Castle to Brighton on this unique, non-competitive, point-to-point adventure through the North & South Downs. Fully way-marked (no navigation) and full support.
- 1.2 miles lake swimming
- 67 miles road cycling + 3550 ft ascent
- 14 miles trail running + 1512 ft ascent
- 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 + 108 ft ascent
- Sun 27 Jul
- FREE-£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
- 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
- £58-£120
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
- Sprint aquabike
- Sun 17 Aug
- £58-£99
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
- £21-£29
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
- £12-£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
- £78-£120
ATW Grafham Triathlon
Sprint or Standard Tri or Aquabike, in and around the beautiful, clean reservoir, on a flat course for all abilities with custom-designed medal, free photos and finish line goodies.
- Sprint triathlon
- Olympic triathlon
- Standard aquabike
- Sun 14 Sep
- £20-£74.50
Woking Autumn Triathlon & Junior Aquathlon
Book Your Spot for the Woking Triathlon! Join one of the most popular triathlons, where athletes return year after year!
- Super sprint triathlon
- Sprint triathlon
- Kids aquathlon 5
- Sprint aquathlon
- Sun 21 Sep
- £78-£180
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-£37
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
- Sat 4 Oct
- £47-£88
Dorney Duathlon | October
Take on a Super Sprint, Sprint or Standard distance and take the opportunity to race around this unique and inspiring Olympic venue!! This event is draft-illegal.
- Super sprint duathlon
- Sprint duathlon
- Standard duathlon
- Sun 12 Oct
- £58-£83
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
- £19-£35
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
- £58-£90
ATW Grafham Duathlon - Incorporating the European Standard Duathlon Qualifier
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 2 Nov
- FREE-£37
ATW Bedford 10K & Half Marathon
This event is more than just a run. You’ll be warmed up with personal trainers, welcomed home by a professional commentator and your cheer-squad will be kept fed and watered by quality caterers!
- Fun run
- 10K run
- Half marathon
- Sat 8 Nov
- £14-£37
ATW Remembrance Runs
Join ATW for the Remembrance Runs at The Carver Barracks, (Formerly Debden Airfield), in Essex to help honour our fallen heroes and raise money for this fantastic military charity.
- Fun run
- 5K run
- 10K run
- Half marathon
- 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 30 Nov
- £22-£24
ATW Hatfield 5
Join ATW Events for the 11th Year of the Hatfield 5, now featuring the Herts County Championships, this is the region's fastest 5 miler (3rd fastest time in the UK 2022).
- Road run
- 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
- Sun 14 Dec
- FREE-£31
ATW Stevenage Winter Half Marathon & 10K
Starting and finishing on the fantastic Ridlins Stadium athletics track, the half marathon winds its way around the superb traffic-free tarmac routes that cover the town of Stevenage.
- Fun run
- 10K run
- Half marathon
- Sun 21 Dec
- £16-£34
ATW Nottingham Holme Run
Organised by ATW Events, this fantastic, traffic-free event takes place at the scenic National Water Sports Centre in Nottingham, offering a perfect setting for runners of all abilities.
- 5K run
- 10K run
- Half marathon
- Wed 31 Dec
- £27-£29
ATW St Albans New Years Eve 10K
Finish the year with a brand new PB and celebrate the arrival of a brand new year with a glass of fizz and a healthy twist at this New Year's Eve running extravaganza.
- 10 km road running + 108 ft ascent
- Sun 18 Jan 2026
- £12-£30
ATW Mallory Race Circuit Winter Runs | Half Marathon, 10K, 5K and Fun Run
Gear up for an adrenaline-packed winter running experience like no other at Mallory Park Motor Racing Circuit!
- Fun run
- 5K run
- 10K run
- Half marathon
- Sun 25 Jan 2026
- £25-£31
ATW Bedford 5 & 10
This flat, fast, traffic-free and chip timed event is a sure-fire guaranteed way to give you the best chance of a PB over the 5 or 10 mile distance.
- Fun run
- 10 miler
- Sun 1 Feb 2026
- £12-£33
ATW Watford Half Marathon, 10K & Fun Run
This popular event has a strong history within the running community and has been taking place for over 40 years! Join a day of running, community spirit and exciting experiences.
- Fun run
- Half marathon
- 10K run
- Sun 15 Feb 2026
- £28-£30
ATW Love Welwyn Garden City 10K
11th anniversary! Welcome to the Love Welwyn Garden City 10K — historically held around Valentine's Day this is the event that encourages you to fall in love with running.
- 10 km road running + 246 ft ascent
- Sun 22 Feb 2026
- £26-£36
ATW Bedford Half Marathon & 10K
This chip timed event is a sure-fire guarantee to give you the best chance of a PB in the Half Marathon or 10K.
- 10K run
- Half marathon
- Sun 1 Mar 2026
- £17-£31
ATW Great Yarmouth Seafront Half Marathon, 10K & 5K
Combines the thrill of running and the picturesque charm of Great Yarmouth over a fast-paced course through the town's rich history and vibrant landscapes.
- 10K run
- Half marathon
- 5K run
- Sun 8 Mar 2026
- £18-£36
ATW Nottingham Holme Run
Join this fantastic experience on a completely flat course – perfect for achieving your personal best over a certified, accurate route, with free race photo, custom medal and friendly support!
- 5K run
- 10K run
- Half marathon
- Sun 15 Mar 2026
- £16-£27
ATW Debden 10K and 5K
This disused airfield has a fast, flat, tarmac course with no sharp corners, and the surrounding tree cover makes for relatively still conditions on most days - but your PB or run stress-free.
- 5K run
- 10K run
- Sun 15 Mar 2026
- £32-£34
Essex 20
The Essex 20 is held annually and is an ideal 20-mile race for the build-up to Marathon season, set over a 5-lap, flat, fast, tarmac course. Also hosting the Essex County Road Running Championships.
- 20 miles road running + 195 ft ascent
- Sun 22 Mar 2026
- £24-£34
ATW Run Fest at Lee Valley
Smash your personal best on a traffic-free, flat and fast course from the White Water Centre and into surrounding beautiful regional parkland with a custom-designed medal for finishers.
- 10K run
- Half marathon
- Fri 3 Apr 2026
- £26-£28
ATW St Albans Easter 10K
A flat, fast and chip timed event - it's a sure-fire guarantee to give you the best chance of a PB in the 10K.
- 10 km road running + 108 ft ascent
- Mon 6 Apr 2026
- FREE-£32
ATW Stevenage Spring Half Marathon & 10K
From the fantastic Ridlins Stadium athletics track, wind your way around superb traffic-free tarmac routes and enjoy the beautiful Fairlands Valley Park the return to a vibrant event village!
- Fun run
- 10K run
- Half marathon
- Fri 8 Aug
- £12-£14
ATW Colchester Friday Night Runs | 1 Mile Road Race/Fun Run
Incorporating the Essex 5K County Championships.
- 1 mile road running
- Fri 8 Aug
- £19-£21
ATW Colchester Friday Night Runs | 5K Road Race
Incorporating the Essex 5K County Championships.
- 5 km road running
- Sat 23 Aug
- £12-£29
ATW Mallory Race Circuit Summer Runs - Half Marathon, 10K, 5K & Fun Run
Welcome to the ATW Mallory Race Circuit Summer Runs! (Incorporating the Leicestershire 5k Championships). Get ready for an electrifying summer running experience at Mallory Park Motor Racing Circuit!
- Fun run
- 5K run
- 10K run
- Half marathon
- Sat 27 Sep
- £75
Fortitude Ultra - Denbies
10 Hrs : 10 Laps : You-vs-You
- 10 hrs trail running + 666 ft ascent