Mansfield Dam Run the Light
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Mansfield Dam Run the Light - Winter Solstice
The Mansfield Dam Run the Light is a daylight endurance event at Jessica Hollis Park on Lake Travis in Austin, TX on December 26, 2026. It is a lap-based out-and-back course along the lakeshore that runs only during daylight hours.
Distances and formats include:
- 5K: set distance with timed results
- 10K: set distance with timed results
- Endurance Run: lap-based, ranked by distance completed before sunset
The endurance format allows self-selected start windows and encourages participants to manage their own time, pacing, and refueling. Laps count only if completed before sunset. There are no eliminations or overnight running; participants may stop at any time and all completed distances count. An aid station is available at the loop hub throughout the event.
Results and recognition differ by event: 5K and 10K receive timed results by age group; the Endurance Run is ranked by total distance completed before sunset and may use chip timing. Awards include most laps completed, furthest distance by gender, and a final lap finisher recognition at sunset. Participants also receive a custom challenge coin as part of the Race Austin Series collector program.
Participant numbers are capped to meet City of Austin requirements. The event is pending final permit approval; if the permit is not approved, registered participants will be offered a refund or a deferral. Visit the organization's website for the most recent information.
