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 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
- Sat 27 Sep
- £75
Fortitude Ultra | Denbies
10Hrs: 10 Laps: You-vs-You. Complete 10 laps of the ~3-mile, 4-mile or 5-mile loops in the given time through the scenic Denbies Wine Estate.
- 10 hrs trail running
- 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
- Sat 2 May 2026
- £58-£120
Dorney Triathlon | May
Take on this multi-activity event as an individual or as a relay, and enjoy the opportunity to race around the unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.
- Super sprint triathlon
- Sprint triathlon
- Olympic triathlon
- Sprint aquabike
- Standard aquabike
- Sun 3 May 2026
- £53-£115
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 10 May 2026
- £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
- Sun 24 May 2026
- £63-£135
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 7 Jun 2026
- £135-£175
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
- Middle aquabike
- Sun 14 Jun 2026
- £11-£36
ATW St Albans Half Marathon, 10K, 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
- 10K run
- Sat 8 Aug 2026
- £130-£270
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 8 Aug 2026
- £110-£195
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 8 Aug 2026
- £63-£115
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.
- Sprint triathlon
- Olympic triathlon
- Standard aquabike
- Sprint aquabike
- Sat 8 Aug 2026
- £55-£90
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 20 Sep 2026
- £53-£115
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