Marble Falls Triathlon
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Marble Falls Triathlon, Marble Falls, Texas
The 23rd Annual Marble Falls Triathlon will take place on July 26, 2026 at 108 Buena Vista Drive, Marble Falls, TX. The event is USAT sanctioned and uses the freshwater of Lake Marble Falls for the swim, roadways through town and surrounding farm and ranch areas for the bike, and a lakeside neighborhood for the run.
Distances:
- Intermediate: 1 km swim, 16 mile bike, 4.4 mile run
- Sprint: 500 m swim, 12 mile bike, 2.2 mile run
Swim starts use a time trial format. Athletes are asked to estimate their open-water swim time for the applicable distance so bibs can be assigned; faster swim times are scheduled to start first. Water temperature is typically in the 80 to 84 degree range and wetsuits are not legal for award eligibility under the stated USAT rules.
Race rules note that a bicycle must be in good working condition and that a bicycle helmet with a chin strap is mandatory; skate helmets and e-bikes are not allowed. If a participant lacks a USAT membership, a one-day USAT membership is required at registration for a stated fee.
Registration requires participants to be at least 13 years old. There are no race day registrations and the event has a no refunds policy. Packet pick up is scheduled at locations in San Antonio, Austin, and Marble Falls in the days prior to the race.
Awards include overall male and female winners by category, masters overall, first through third in five-year age groups for Intermediate and Sprint, and top relays. Visit the organization's website for the most recent information.
