The San Antonio Marathon, first held in 1994, is an annual marathon held in San Antonio, Texas, United States. The race is organized by the San Antonio Road Runners and is held on the first Sunday of December. The marathon starts and finishes at the Alamodome.
The San Antonio Marathon is a Boston Marathon qualifier and is one of the largest marathons in the United States. In 2022, over 20,000 runners participated in the race. The marathon is also a popular destination for charity runners, with over $1 million raised for local charities in 2022.