Backyard Ultra
Great Springs Trail Race - Natural Bridge Caverns
About this race
Great Springs Trail Race - Natural Bridge Caverns is an endurance event in the backyard ultra sector held in San Antonio, TX on Saturday, September 26, 2026. The course covers Backyard Ultra, and the field welcomes both professional and amateur athletes. Registration is open. Details are syndicated from runningintheusa.com; always confirm timing and entry information with the official organizer before race day.
Before you line up
Race-day planning
Great Springs Trail Race - Natural Bridge Caverns is held on Saturday, September 26, 2026 in San Antonio, TX. The start time is to be confirmed by the organizer. Registration is currently open — use the official registration link above to enter directly with the organizer.
Always confirm the date, start time, entry fee and course details on the official event site before you travel or register, as race information can change after a listing is published. For discipline-specific guidance on what to expect and how to prepare, see the Backyard Ultra sector guide.
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