OARS has unveiled its latest recreational guide map of the Sudbury River, which has followed the release of the Assabet guide. The Concord version is set for release in 2017 or 2018.

At a basic level, the Sudbury River is why we are here. It's the reason there is a Framingham, an Ashland or most of the other towns along the waterway that curves from its ragged headwaters at ...