This section of trail has blue blazes, and goes NE along the shore (further than shown on map) and connects with the yellow trail. Trail is pretty wet and infrequently used along the pond.

Yellow blazes.

Conscience Hill is owned by MIT and hiking is allowed. But intervening parcel between MIT land and Timberlake Conservation property is private.
Private land extends SSE roughly parallel to Timberlake parcel from town line, through this point, to Keyes road.

All main trails have yellow blazes

The town claims parking here, but it's one vehicle and you need to park on the trail. There is a spur that connects to the trails at the corner of the Ronchetti Area.
https://www.shirley-ma.gov/sites/g/files/vyhlif5001/f/uploads/trails_map_2.pdf

Trail crossing is a bit sketchy during wet seasons. Cross narrower portion 5 yards upstream.

Signage states private property, but walking the trail is allowed as long as you stay on the trail and have pets leashed. Warns of video surveillance.

Land north of boundary is not owned by Concord Conservation. Hiking is allowed per posted rules.

Standing water/ice in February, along stone wall.

Official trail runs SW from here; another trail continues southerly to ?
Note that signage for this property notes that some portions are private and to stay on the trail.