Walking1:29:57* 4.78 km (18:49 / km) ahr:79 max:138
Assabet River National Wildlife Reserve in Sudbury. We were hoping for a few bird sightings but besides small ones flitting in the forest we only saw turtles sunning on logs in Puffer Pond.
The area used to be used to store munitions and has quite a few bunkers scattered in the woods. One-contour high man-made elongated hills with vertical cliff faces (concrete walls with entry doors on one end) are now harder to see as trees grow on the dirt covering them. Converted to a refuge in ~2003.