A man flagged down police on Mt. Auburn Street after his bicycle was stolen from in front of his house on Sept. 7 at 2:31 p.m.
The suspect was described as a young black male, and police got a description of the bike, said Watertown Police Lt. Michael Lawn.
Police found the bike on Halworthy Street, located just over the line in Cambridge.
"A neighbor said he saw a man run through the yard that leads to a set of train tracks," Lawn said. "The suspect was found behind some bushes on Halworthy."
A 24 year old man from Cambridge will be summonsed to Waltham District Court for larceny over $250, Lawn said.