Merrymount Equestrian Center 8801 Frank Tippett Rd, Upper Marlboro, MD20772 Located in the Rosaryville area of Upper Marlboro, Merrymount Equestrian Center offers a range of activities year round…More for all ages and levels of proficiency. From mid June through August, Merrymount conducts its summer program for children of all skill levels ages 6 to 16. During this summer program children are given riding instruction and taught equestrian skills. Instruction continues during the remainder of the year and in the event of inclement weather held in Merrymount's indoor arena. In-house shows and clinics are also available periodically in addition to full care horse boarding. Please call for more information and rates.