I've done this ride before, and it's a lot of fun. Here is the official description:
"We are excited to partner with Artworks Trenton on this year’s Trenton Bike Tour and our theme will be community gardens. The ride is approximately 14 miles, and the Trenton police will escort us through intersections. Only the first 100 registrants receive a free tee-shirt, so sign up today! As part of National Bike Month and marking the culmination of National Bike to Work Week, the tour aims to not only highlight the city’s many tourist attractions, but also promote healthy lifestyles and raise awareness of bicycle safety throughout the region for avid and recreational cyclists."
Last year they had a barbecue at Artworks at the end of the ride. I'm not sure whether this is planned for 2014.
The starting point is at Mill Hill Park, which is within a few blocks of the Trenton train station. There is more info at the official link: