57 + 5 is the area code of Boulder, Colorado . Boulder, Colorado is at an elevation of 570 m . The area of the urban region is 1,770 sq mi (4,600 km 2 ) . Boulder, Colorado is located in Georgia . 2,493.86 km 2  (962.88 sq mi) is the area of the metro region of Boulder, Colorado . 25°25′S 49°15′W﻿ / ﻿25.417°S 49.250°W are the coordinates of the city. . Boulder, Colorado has January 1, 1894 population . The water area of the city is 4.08 sq mi (10.57 km 2 ) . Boulder, Colorado is the government of National Park Service . The land area of the city is 314.95 sq mi (815.72 km 2 ) . The city Boulder, Colorado demonym is Caleño . On July 22, 1882 the city was incorporated . The density of  inhabitents in Boulder, Colorado is 480.827/km 2  (1,245.34/sq mi) . 720/km 2  (1,900/sq mi) is the density of people in  the metro region of Boulder, Colorado . The lowest elevation of Boulder, Colorado is 246 ft . The highest elevation of Boulder, Colorado is 14,110 ft (4,300 m) . The postal code of the city is 207, 208, 220 - 224, 226 - 228, 231 - 239, 241 - 244, 247 - 249, 251 - 253 . 464.71/km 2  (1,203.6/sq mi) is the density of inhabitents in  the urban region of Boulder, Colorado
The metro region of Boulder, Colorado is 1320 sq mi)