I was able to identify this tree easily because I grew up planting and maintaining crape myrtles (Lagerstroemia indica). They can range from 3 feet to 30 feet tall and are native to areas of southern China, southeast Asia, and Japan. Most crape myrtles you see in the United States are hybrids of some sort that is why there is such a range of heights. This one is on St. Edwards University’s campus and is a mid-sized crape myrtle, which range between 10-15 feet tall. You might also know this as lilac of the south. In the United States, their popularity comes from their long bloom periods making them great trees for landscaping.
My iNaturalist post can be found here.