Austin Marathon 2025 Registration Form. Your 2025 austin marathon swag breakdown: Austin, texas, may 6, 2024 — registration for the 2025 ascension seton austin marathon, half marathon & 5k ® officially opens tuesday, may 13th.

For this reason places fill quickly and. Prepare to join the excitement of the ascension seton austin marathon & half marathon on february 16, 2025.