Bigfoot Running Company - San Antonio

Event overview

Spring Fling - San Antonio takes place on Sunday, April 12, 2026, at Lady Bird Johnson Trail Park, 10700 Nacogdoches Rd, San Antonio, TX 78217. The event is presented by Bigfoot Running Company. Packet pickup opens 1.5 hours before the race start. Shirts are guaranteed if requested at least 10 days before race day. The course surface includes mixed surfaces: pavement, crushed granite, and dirt paths. Races proceed in all weather.

Races and awards

• Kids Dash - 20-yard dash for ages 10 and under; not timed; includes tee, finisher medal, and pin.
• 1 Mile - not chip-timed; includes tee and finisher medal.
• 5K - approximately 5K (about 3.1 miles); chip-timed; age-group awards and overall trophies.
• 10K - approximately 10K (about 6.2 miles); chip-timed; age-group awards and overall trophies.
• Volunteer then Run (5K) - volunteer role combined with a chip-timed 5K; limited to early sign-ups.
• Virtual Run - remote participation option.

For the 5K and 10K, awards include 1st overall male/female trophies, recognition for 1st Masters (40+), and standard age-group medals for multiple age categories.

Registration and volunteers

Youth pricing allows ages 12 and under to enter the 5K or 10K for $15. Registration for the 5K and 10K showed a temporary close on January 5, 2026 and re-opened on January 6, 2026; other event registrations close on April 12, 2026. Volunteer roles include water stations, course monitors, finish-line helpers, packet pickup, lead bike, mascot, and a full race volunteer program that offers a race shirt, VIP access, and a future entry or gift-card option. Public park users may be encountered on course. Visit the organization's website for the most recent information.