The Queen could be seen riding around Home Park, next to Windsor Castle, over the weekend, wearing a green jacket and a colorful scarf.
The images, released Sunday, feature the monarch riding Balmoral Fern, a 14-year-old fell pony, according to a Buckingham Palace news release.
The Queen has long been known for her love of equestrian pursuits, including horse racing, and has regularly been photographed on horseback over the decades.
Trooping the Colour, the military parade held annually in mid-June to mark the official celebration of the Queen's birthday, was also canceled.
CNN's Alaa Elassar and Max Foster contributed to this report.