The Town River Bay is located on the southern edge of Boston Harbor and is sandwiched between the towns of Weymouth and Quincy off the Weymouth Fore River. Inside the harbor you will find a variety of marinas, with two of the large facilities lying on the south shore of the bay. There is an anchorage on the north shore, and a smaller marina near Cat Island as well. Quincy is a fairly industrial city, so there is not much of a tourist industry here, but it is a pleasant and quiet stop nonetheless.
Use NOAA Chart 13270.
The approach to Town River Bay starts in the Weymouth Fore River at flashing green "1" just north of Pig Rock and The Piglets. From here, join the Weymouth Fore River Channel at flashing red buoy "WW" and set a course to the south along the well marked channel towards Fort Point and Jacknife Ledge, and then pick up quick flashing red "22," where the channel turns to the southwest and closer to the opening at Town River Bay.
Town River Bay opens up at Germantown Point and flashing red buoy "28" (visible in the image above). From here, you can head into the harbor and Hole Point Reach. Depths here average at least ten feet, and the channel is well marked.