|Barn Door Hills|
Western Barndoor Hill from Barndoor Hills Road, looking slightly south of west
|Elevation||c. 560 feet (171 m) and c.. 580 feet (177 m)|
|Parent range||Metacomet Ridge|
|Age of rock||200 million yrs.|
|Mountain type||Fault-block; igneous|
The Barn Door Hills of north-central Connecticut are a pair of prominent rocky trap rock knobs separated by a steep sided gap. They are located in Granby, Connecticut. The hills are an outlying section of the narrow, linear Metacomet Ridge that extends from Long Island Sound near New Haven, north through the Connecticut River Valley of Massachusetts to the Vermont border. The crest of the Metacomet Ridge is located 3.75 miles (6.04 km) east at Hatchet Hill.
East Barndoor Hill is located in the 4,000-acre (16 km2) McLean Game Refuge founded by former United States Senator George P. McLean and now a National Natural Landmark.  A hiking trail climbs the summit of the hill. West Barndoor Hill is maintained by the Granby Land Trust. 
- Farnsworth, Elizabeth J. Metacomet-Mattabesett Trail Natural Resource Assessment July 17, 2004. Cited November 1, 2007.
- Connecticut Walk Book: A Trail Guide to the Connecticut Outdoors. 17th Edition. The Connecticut Forest and Park Association. Rockfall, Connecticut. Undated.
- Raymo, Chet and Raymo, Maureen E. Written in Stone: A Geologic History of the Northeastern United States. Globe Pequot, Chester, Connecticut, 1989.