The event, which sees volunteers dress up and walk along a 26-mile route in aid of the sports centre for disabled athletes, was well attended despite the miserable weather.
Teams dressed as tennis players, swimmers and snooker players took to the streets armed with collection buckets for the fundraiser.
The walk kicked off at 9.30am, with MP for Maidenhead Theresa May and The Mayor of Windsor and Maidenhead, Cllr Colin Rayner, in attendance.
Mrs May said: "It is a great club that does fantastic work and today is a really important day for them."
SportsAble president John Jenkins added: "We have had great support and everyone has been in great spirits. A bit of rain won't change that."
Organisers hope money raised on the day and sponsorship will top £10,000.
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The Met Office has issued a yellow alert for Windsor and Maidenhead, Slough and Wokingham, warning that rain moving eastwards across the south of the country may turn to snow in some places.