[1] Bryn Mawr was sired by Atheling and out of the mare Maggie Weir, a daughter of The Bard.
In the last sixteenth of a mile, he emerged in front and beat the runner-up by a length going away and stretching the lead with stride.
[5] Later in his three-year-old season Bryn Mawr went on to win the mile and a half Brooklyn Derby at Gravesend Race Track on Coney Island, New York[6] and the seven furlong Larchmont Stakes at Morris Park Racecourse in Westchester County, New York.
In his four-year-old season Bryn Mawr won the Broadway Stakes at a mile and one sixteenth at Gravesend Race Track.
By 1911, Bryn Mawr had been given to the Maryland Breeding Bureau and was a stud horse at the farm of R. J. Walden in Middleburg.