Juliette Vielhauer

Bio

Juliette Vielhauer is a 25-year-old runner making waves in the Dallas-Fort Worth running scene with her remarkable debut marathon performance. In December 2025, she ran 3:01:57 at the California International Marathon (CIM), qualifying for Boston 2027 in her very first 26.2-mile race. A former competitive lacrosse player, Juliette's athletic journey began early—winning her county cross country championship in elementary school before dedicating herself to lacrosse from age 9 through her college years. She played varsity lacrosse all four years in high school and continued with club lacrosse at Cal Poly San Luis Obispo, one of the top programs on the West Coast. After earning her bachelor's degree at Cal Poly, she moved to Dallas in 2021 to pursue her master's degree at SMU, where she played one final lacrosse season. Juliette didn't start running seriously until early 2023, when she signed up for her first half marathon without having raced a single 5K. What began as a way to fill the competitive void left by lacrosse and meet people in her new city quickly evolved into something more. She immersed herself in the Dallas running community through groups like White Rock Running Co. and TNSR Plano, building her fitness and finding her tribe. During her CIM marathon, Juliette not only broke three hours but also PR'd her half marathon split with a 1:28, showcasing her untapped potential. Now living in Plano and training for the Big Star Half Marathon elite field in April 2026, she's targeting a sub-1:25 finish—another ambitious goal in what's shaping up to be an exciting running career. When she's not logging miles, Juliette plays in a Dallas adult women's lacrosse league and works remotely in her corporate role. With just two years of serious running under her belt and a 3:01 debut marathon already in the books, she represents the next generation of elite talent emerging from the DFW running community.