We are very grateful to our official partners who help us deliver the very best racing experience for our athletes as possible.

Health Insurance Partner and School's Roadshow Partner

WPA Health Insurance

With a heritage stretching back 120 years, over 360,000 people across the UK trust WPA with their Health Insurance – from families to some of the largest companies in the country. WPA focus on providing market leading customer service – they are currently the highest rated UK Health Insurer on Trustpilot.

Learn more

Coaching Partner

Tri Training Harder

Tri Training Harder are a group of highly skilled and passionate coaches who help prepare athletes to achieve their extraordinary dreams. Tri Training Harder help Castle Race Series athletes prepare for our iconic events through different coaching packages which include race specific training plans, pre-event training sessions and a virtual training club.

Learn more

Communications Partner

Bulk SMS

BulkSMS have been supported of Castle Race Series from the very start. They ensure that all our competitors receive race information direct to their phones. BulkSMS are a leading SMS messaging service provider offering two-way SMS communication services from your internet enabled computer. The BulkSMS gateway reaches across borders and connects to over 800 mobile network operators world-wide.

Learn more

Swim Partner


Yonda puts your performance as their focus. Their wetsuits are built with technical neoprene panels, the right balance of flexibility and buoyancy and will aid your swim style. Their Italian made trisuits that are breathable, lightweight and fast drying – ensuring that you can keep racing towards the finish line. 

Learn more

2 Wheel Electric Mobility Partner


As the world’s leading two-wheeled electric vehicles, NIU Electric Scooters deliver a quiet and comfortable ride as an eco-friendly alternative to petrol mopeds. We believe that life is more than waiting in traffic and living with pollution. NIU is here to free you from urban congestion and make life electric.

Find A NIU UK Store