- Sat 5 - Sun 6 Oct
- £8-£78
- Sat 5 - Sun 6 Oct
- £8-£78
Hexham, Northumberland, UK
Kielder Marathon Weekend
Britain's Most Beautiful Marathon returns complete with trail runs, a gravel duathlon and junior fun runs, all enjoying the stunning backdrop of Kielder Water and warm northern spirit.
- Music
- Event village
- Rural
- Free venue entry
- Age 6 & over
- Standard duathlon
- 10K run
- Marathon
- Half marathon
- Fun run 2
- Sun 20 Oct
- £55-£80
- Sun 20 Oct
- £55-£80
Northampton, Northamptonshire, UK
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.
- Newcomers
- Event village
- Park
- Rural
- Age 15 & over
- Sprint duathlon
- Standard duathlon
- Sat 5 - Sun 6 Oct
Hexham, Northumberland, UK
Kielder Marathon Weekend
- 10K run
- Standard duathlon
- Fun run 2
- Half marathon
- Marathon
- Sun 6 Oct
Haverhill, Suffolk, UK
HaverTri - the Adams Harrison Triathlon Festival
- Kids aquathlon 5
- Sprint triathlon 2
- Sprint duathlon 2
- Sprint aquathlon
- Sun 6 Oct
Lydney, Gloucestershire, UK
The Last Tri
- Sprint triathlon
- Olympic triathlon
- Sprint duathlon
- Sun 6 Oct
Gravesend, Kent, UK
MedwayTri Junior Duathlon - IRD for London, East and South East
- Kids duathlon 6
- Sun 13 Oct
Shrewsbury, Shropshire, UK
Shrewsbury Junior and Super Sprint Duathlon
- Kids duathlon 4
- Super sprint duathlon
- Sun 13 Oct
Fareham, Hampshire, UK
Deviation Duathlon
- Sprint duathlon
- Standard duathlon
- Long duathlon
- Sun 13 Oct
Gravesend, Kent, UK
South East Team Relay, Fast Furious and GOTri Duathlon
- Super sprint duathlon 2
- Sprint duathlon
- Sun 13 Oct
Brandon, Suffolk, UK
Can But Tri Adult Duathlon Series - Event 2
- 2.25 km trail running
- 7.25 km mountain biking
- 2.25 km trail running
- Sun 27 Oct
Huntingdon, Cambridgeshire, UK
ATW Grafham Duathlon (inc. 2025 World Championship Standard Distance Duathlon Qualifier)
- Sprint duathlon
- Standard duathlon