Vega. In the 1980s, thanks to publisher Wayne Green, "Peterborough was clearly the per capita magazine production capital of the world." Over 100 magazines, mostly about computers and technology, were published there; these included Byte and MacComputing. Peterborough's leadership in environmental protection began in the 1990s, when its Earth Day USA office supported the US Air Force's annual Earth Day events around the world. Geography According to the United States Census Bureau, the town has a total area of , of which are land and are water, comprising 1.06% of the town. Peterborough is drained by the Contoocook River and its tributaries, Nubanusit Brook and Otter Brook. The entire town is part of the Merrimack River watershed. The highest point in Peterborough as well as in Hillsborough County is the summit of South Pack Monadnock ( above sea level), in Miller State Park in the southeast corner of town. Peterborough is also home to Edward MacDowell Dam and Lake recreation area, where visitors can walk across the dam, hike, cross-country ski, swim, boat, picnic, play Frisbee golf, horseshoes or other recreational opportunities, many of them disabilities accessible. The town is crossed by U.S. Route 202 and Route 101. Demographics As of the 2010 United States census, there were 6,284 people, 2,713 households, and 1,629 families residing in the town. The population density was 167.0 people per square mile (64.3/km). There were 2,956 housing units at an average density of 78.4 per square mile (30.3/km). The racial makeup of the town was 96.1% White, 1.8% Asian, 0.7% Black or African American, 0.2% Native American, 0.02% Pacific Islander, 0.4% some other race, and 0.8% from two or more races. Hispanic or Latino of any race were 1.4% of the population. There were 2,713 households, out of which 28.1% had children under the age of 18 living with them, 45.8% were headed by married couples living together, 10.6% had a female householder with no husband present, and 40.0% were non-families. Of all households 33.6% were made up of individuals, and 15.2% were someone living alone who was 65 years of age or older. The average household size was 2.24, and the average family size was 2.85. In the town, the population was spread out, with 21.5% under the age of 18, 6.2% from 18 to 24, 19.9% from 25 to 44, 30.3% from 45 to 64, and 22.0% who were 65 years of