Emily Infeld made a rare off-track foray a successful on Saturday, taking second at the Gate River Run 15K in Jacksonville, Florida. The race served as the U.S. 15K championships for women and men.

In the longest road race of her life, Emily set a personal best of 49:42. Jordan Hasay won in 49:28, and Neely Spence Gracey was third in 49:47. Those two are deep in preparation for next month’s Boston Marathon, making Emily’s season opener that much more impressive.

“Starting to like these longer distances but excited to be back on the track for some 5k/10k action,” Emily wrote on Instagram after her race.

In the men’s race, won by Olympian Leonard Korir in 43:22, German Fernandez was 14th in 44:57 and Sean Quigley was 20th in 45:33.