Ah I see. Thank you for the replies. If it starts at or near the Yale campus this could be the resource I absolutely wanted. For sure I would be back after dark, the kids' event will be over by then but as always I never go on bike paths after dark anyway. They seem to be those isolated kind of places inviting activities or characters that could pose a safety risk when night falls. It's only my feeling and assumption but still you never go wrong when you pay attention to basic fear telling you that you don't belong somewhere.
Can I ask you the favor for you post me a link or map location of the trail start near the Yale campus then?