The One on the River - Marlow - May

About this event

The One on The River brings multisport racing to the scenic Thames Valley, with the historic river itself as the centerpiece. Athletes swim in the Thames before tackling undulating roads on the bike and finishing along the Thames Path, where river views and countryside create a memorable backdrop. The event offers an impressive range of distances across triathlon, duathlon, aquabike, and aquathlon formats, plus standalone swim options. Whether tackling a sprint distance or stepping up to the middle format, participants experience a well-organized event that balances natural beauty with genuine athletic challenge. The mix of flowing water, rolling terrain, and Thames-side running makes for a distinctive multisport experience in one of England's most picturesque settings.

Distances