We have partnered with Macmillan Cancer Support to help raise vital funds to support their work. This partnership gives athletes the opportunity to compete in Castle Race Series events with a discounted race place by making a fundraising commitment. There are also opportunities to make one off donations via our booking forms, via JustGiving, VirginMoney and at the live events.

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.

Precision Fuel & Hydration are providing the on-course electrolyte drinks, energy gels and chews. They can help you nail your fuelling and hydration strategy with their suite of free online tools and expert athlete support via email or free one-on-one video consultations. Just reach out to get started.

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.