Ulnes Walton Bridleways Association (UWBA) is leading the Wear Anything Pink Ride from Longton Riding Club, in Moss Lane, Ulnes Walton, on Sunday March 19, in aid of Cancer Research UK and Dementia UK.
The event will start at 9am, with three different routes - 20km, 25km and 32km.
Sue Taylor-Green, chairman of UWBA, said: “We normally raise funds for ourselves but seeing as we had enough to keep us going, we thought we would support other causes.
“We have had a few members affected by cancer or dementia and so it made sense to help those.
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“We hope to have more than 80 horses and we expect it to be a fun event. It is open to anyone who has a horse and we would love them to wear pink.
“I am really looking forward to it.”
Entry is £15. Closing date is March 15.
To enter visit http://www.ulneswaltonbridleways.co.uk or call 01772 436043.