Four Fillies Farm 55 Allen St, Lexington, MA02421 The Four Fillies Farm has been in business since August 2004. The riding stable offers the following lessons: private,…More semiprivate, group, party and team. All of these lessons include use of its horses. If you already own a horse, you may bring it to the facility by trailer and use it for a lesson. Please see Four Fillies' website for rates and other information. In addition, check out the Barn Flies summer program, which pairs a student with a horse or a pony. There are also several other "horsemanship" programs available. Four Fillies Farm hosts horse shows at the farm; please call for the date of the next show.