Ran across this while riding the KATY bike trail - The “Big Tree” is a nearly 400-year-old bur oak (Quercus macrocarpa) tree near the Missouri River in Boone County, Missouri. It is tied for National Champion, representing the largest tree of its species in the United States. Standing alone in the floodplain of the Missouri River, and near the city of Columbia, Missouri, it is a well-known landmark