Camp Rim Rock: Girls Summer Camp, Girls Residential Camp, Horse Camp, Riding Camp, Equestrian Camp, Girls Horseback Riding Camp, Girls Camp, Horseback Riding Camp Camp Rim Rock is one of the best overnight camps for girls in the country. Camp is located less than 2 hours from Northern Virginia, Maryland and Washington, D.C. While at overnight camp, the girls participate in horseback riding, sports, performing arts, arts and crafts and swimming. Parents can relax knowing that Camp Rim Rock has been one of the finest girls residential camps for 61 years. We have two and four week sessions and specialty camps in riding and a mini camp. Find out more about our overnight camp for girls.