17 miles with the trail-a-bike to/from my job's summer picnic. First 9 miles were also w/ my 9 yr old on his bike, but he ate himself sick at the picnic and, combined w/ a weird mechanical, he and his bike got a ride to my wife's office for the rest of the day.

5 yr old on t-a-b got sooo excited when we were pushing 40mph down this one hill. She claims to be shy and tremulous, but she is the biggest nut in the family.