After I found this wonderful new-to-me kayak launch, I felt it absolutely called for a cache to show off the natural beauty of the location. If you put your kayak in the water here and go R, you meander a bit and end up at the Charles River pretty quickly. The water was high today, so we could not fit L under the bridge, but when the water is lower the Stop River continues 9.3 miles to its origin at Highland Lake in Norfolk. A peaceful place to kayak, seemingly popular with fishermen too early in the morning.
There's a small token for the FTF. Happy caching!