_#_Land boundaries: 12,248 km total; Canada 8,893 km (including 2,477 km with Alaska), Mexico 3,326 km, Cuba (US naval base at Guantanamo) 29 km
_#_Coastline: 19,924 km
_#_Maritime claims:
Contiguous zone: 12 nm;
Continental shelf: not specified;
Exclusive economic zone: 200 nm;
Territorial sea: 12 nm
_#_Disputes: maritime boundary disputes with Canada; US Naval Base at Guantanamo is leased from Cuba and only mutual agreement or US abandonment of the area can terminate the lease; Haiti claims Navassa Island; US has made no territorial claim in Antarctica (but has reserved the right to do so) and does not recognize the claims of any other nation; Marshall Islands claims Wake Island
_#_Climate: mostly temperate, but varies from tropical (Hawaii) to arctic (Alaska); arid to semiarid in west with occasional warm, dry chinook wind
_#_Terrain: vast central plain, mountains in west, hills and low mountains in east; rugged mountains and broad river valleys in Alaska; rugged, volcanic topography in Hawaii