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After 0.4 miles, the road ended at Look Out Point, just across the border into the Town of Lewisboro. This featured the aforementioned overlook:
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Mountain Lakes Park, Westchester County, New York – December 5, 2010
Mountain Lakes Park, with 1,082 acres, is the northernmost county park in Westchester County, located primarily within the Town of North Salem. There is a summer camp there for disadvantaged children, and other cottages and campsites are available year-round for the general public. The park is described as having a rugged landscape, native hardwood forests, rock outcroppings, meandering streams, beautiful views and the highest mountain in Westchester County. There are also five lakes in the park. It sounds great, but I was not especially impressed. I enjoy overlooks, but there was really only one significant overlook in the park.
I parked beside the Park Office, just inside the entrance to the park. A paved road leads inside the park, forming most of a 3.4-mile orange loop. About 0.2 miles on the road I encountered a dirt road leading to the south. I followed this road:
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After 0.4 miles, the road ended at Look Out
Point, just across the border into the Town of Lewisboro. This
featured the aforementioned overlook:
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Here's a stitched panorama of the view from Look Out
Point:
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I returned the way I had come. It had been below
freezing overnight, and was either still below freezing or not much
above it. This patch of ice covered on spot of the road:
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I returned to the paved road and continued to the
east another 0.4 miles, then struck out “cross country”
toward the northeast on a blue-blazed trail. With so many fallen
leaves, I could not tell where the trail was and had to rely entirely
on blazes. In places, a blaze was missing or was spaced too far
apart, and I had to continue on in the direction I had been moving
and search diligently for the next blaze.
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I found a rock wall:
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A small pond was at least partly
frozen:
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A close-up of the frozen surface:
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The blue trail left the woods at the intersection
with the orange-blazed road and a dirt road. I walked along the road
for a while, then had a choice of continuing on the blue trail across
country or continuing on the dirt road and following a yellow-blazed
loop trail. I switched to the yellow-blazed trail, which soon left
the road to move north and then northwest through the
woods.
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Pretty berries, but probably poisonous.
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In one place, a bridge crossed a narrow stream,
though the stream was so narrow that the bridge seemed
unnecessary.
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Another frozen puddle filled the trail:
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The yellow trail left the park for about 0.1
mile, running along Hunt Lane, then reentered the park running south.
Here's a nice rock outcropping, visible through the trees:
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The next three photos show that a large tree has
fallen and blocked the path. I imagine that eventually the county
will perform some maintenance and clear the trail. 
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Here's another nice rock wall. I had to walk
along side it to clear the tree that was blocking the path.
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Looking back, you can see the tree blocking the
trail:
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Soon afterward, the trail came to a stream. This
stream could have used a bridge. There were no stepping stones, so I
diverted from the path about 50 feet until I found a narrow spot
where I could simply step over the stream.
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The yellow loop intersected the blue loop, so I
crossed back to the blue loop, now moving west. The blue loop crossed
the orange road and continued southwest. I followed it, and it led to
the camp area near the north end of Hemlock Lake.
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Here is Hemlock Lake, with its surface partially
frozen. I sat at a picnic table and had lunch there, watching as a
couple of dead leaves scudded quickly across the ice, before reaching
the border with the as-yet unfrozen water. As the leaves fell into
the water, their progress slowed greatly, due to the increased
resistance.
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I could have hiked a little more, but was getting cold, especially after having been exposed without moving during lunch. I decided to call it a day and headed back to my car. I had only hiked about 4.9 miles, so it was a short day of hiking.