During the event, riders will travel the town trails dressed in costumes from "Around the World."
The horse fair, located near Woodside Town Hall, is expected to draw nearly 2,000 people, organizers say.
For those wanting to get "Back in the Saddle," there will be a booth with information on local riding programs and lessons. The Woodside Public Library will have a booth featuring books on riding, horse breeds and horse care, donated by members of local horse clubs, with proceeds going to the library.
The Silicon Valley Leathercraft Guild will offer hands-on demonstrations. There will also be pony rides, rides on the Wells Fargo Stagecoach, food booths and live music.
Day of the Horse is sponsored by the Woodside-area Horse Owners Association (WHOA). The association says more than $100,000 in proceeds from Day of the Horse events has been gifted to Woodside-area programs, including the Folger Stable renovation in Wunderlich County Park, trail development and maintenance in town, county parks, the Midpeninsula Regional Open Space District, and equestrian activities for children.
Visit whoa94062.org for more information.