2026 Ascension Seton Austin Marathon, Half Marathon, 5K

Lace up for an unforgettable Texas running experience at the 2026 Ascension Seton Austin Marathon, Half Marathon, and 5K, set for Sunday, February 15, 2026, in the heart of Austin, TX. This USATF-certified event, known as one of the country's largest marathons, attracts thousands of runners from across the globe with its vibrant atmosphere and iconic city tour. Runners can anticipate typical race day conditions with comfortable lows around 45F and highs near 67F, offering a pleasant climate with only a 6% chance of precipitation.

The marathon, half marathon, and 5K courses are entirely paved and feature rolling hills, making for a scenic yet moderately challenging run through Austin's diverse landscape. Marathoners will tackle an elevation gain of over 1,000 feet, including a steady climb up South Congress Avenue in the early miles and a notable "killer hill" around mile 26. The routes wind through picturesque neighborhoods and past landmarks such as downtown, the Colorado River, historic Hyde Park, East Austin, and the University of Texas campus, culminating in a triumphant finish in front of the majestic Texas State Capitol on Congress Avenue. Comprehensive support is provided along the way with 22 aid stations for the marathon and 9 for the half marathon, offering water, BPN electrolyte hydration, restrooms, and medical assistance, often appearing at nearly every mile.

What truly sets the Ascension Seton Austin Marathon apart is its vibrant "Live Music Capital of the World" spirit, with live bands energizing runners along the course and a lively downtown concert at the finish festival. Participants consistently praise the incredible crowd support that lines the route, cheering them to the finish. Beyond the race, runners can enjoy an amazing expo and a memorable finish line party, complete with snacks, hydration, food trucks, and a unique finisher medal that can be converted into a belt buckle.