The Dallas Marathon (formerly known as the Dallas White Rock Marathon and also known as the BMW Dallas Marathon for sponsorship reasons) is an annual marathon road running event usually hosted in December by Dallas, Texas, and is Texas' oldest marathon, having been held every year since 1971 (with the exception of 2013 and 2020). The marathon begins and ends in Downtown Dallas and runs around White Rock Lake. The race weekend also includes a 5K, a 10K, a half marathon, a 2-person half marathon relay, a 5-person full marathon relay, and a 50K ultramarathon.