Do you have more info? I went on the website and it does not tell you anything about the event or about any of the trails or ride events. Been to Williams several times and have always wondered about trail riding in the area.
I have been to Williams several time you can dry camp in the Kaibab natIonal forest for up to 14 days. There is tons of easy trail as well as i improved dirt roads. Multiple lake and “tanks” and meadows can be found within in the park average elevation is 7k ft.
Take 4th st south out of Williams about 6 miles and turn on any one of the dirt roads. I probably have well over 1.5 k miles ridding around up there