Porcupine Hills

Upland area of southwestern Alberta, Canada, extending north-south for 48 km/30 mi and rising to over 1,220 m/4,000 ft northwest of Lethbridge. Along with the Cypress Hills, they were not completely covered by ice during the last glacial age. On their southern edge is Head-Smashed-In Buffalo Jump, the site of a 10-m/33-ft cliff over which Blackfeet hunters drove herded buffalo for around 5,500 years. Head-Smashed-In Buffalo Jump was made a UNESCO World Heritage site in 1991.

To the southeast is the Blood Indian Reserve, Canada's largest Native Canadian reservation, extending over 1,429 sq km/552 sq mi. Fort Macleod, northwest of the reserve and east of the jump, was an 1870s mounted police post, and is now a trading and tourist centre.