Mills Reservation is a county park, consisting of a 157.15-acre (0.6360 km2) protected wooded area located in Cedar Grove and Montclair, New Jersey, United States.

Views from Montclair to Newark, the Hudson River, and Manhattan can be seen from Quarry Point, a 500-foot basalt ledge on a ridge on the south end of the park.

[1] Activities in Mills Reservation include walking, jogging, hiking, and sightseeing of different plants and animal species, as in all forest parks.

[1] During World War II, the 13th of many military searchlights across the metropolitan area was installed in Mills Reservation at Quarry Point, overlooking New York City.

[citation needed] There are also some reports that that cliff-edge location was used as a fire-beacon station in George Washington's communication, and earlier as a smoke-signal point by the Indians.