Katie Holmes is certainly making the most of her time in Boston while hubby, Tom Cruise, films his new movie in the city.

Just last week spotted her out running with Tom and his son, Connor.

And yesterday she took daughter Suri to the track at Boston University where she ran a few laps, while Suri was looked after by a nanny.

Katie really is taking this fitness thing very seriously…and we’re beginning to wonder if she might actually be in training for something.

More pictures of Katie below…