A total of 38 USEA Interscholastic Eventing League (IEL) team challenges are scheduled to take place in 2021, and the first event to host an IEL team challenge was the Ocala Winter I Horse Trials at the Florida Horse Park in Ocala, Florida. Organized by Megan Gardiner and Emily Holmes, the first IEL team challenge took place on February 11-14 and had five teams and 25 competitors.