Around twelve hundred people are to take part in a triathlon in the lake at Castle Howard in North Yorkshire today. The local Brownlee brothers have spurred an increase in registrations with 65 pairs of siblings racing, having been inspired by their performance last Summer.
Now triathlon is reckoned to be the fastest growing sport in Britain, and Yorkshire's own Olympic heroes - Gold medallist Alistair and Bronze medallist Jonny - are giving even more people the chance to join in.
They're organising a brand new event - the Brownlee Super Sprint Triathlon - which will be held in the stunning surroundings of Fountains Abbey and Studley Royal Park in North Yorkshire on September 21. 700 have already entered - including the lads themselves - and there are still 300 places left.