 In Garibaldi Provincial Park in Southwestern British Columbia over 505 km2 ( 195 sq mi ) , or 26 % , of the park , was covered by glacier ice at the beginning of the 18th century . Ice cover decreased to 297 km2 ( 115 sq mi ) by 1987 – 1988 and to 245 km2 ( 95 sq mi ) by 2005 , 50 % of the 1850 area . The 50 km2 ( 19 sq mi ) loss in the last 20 years coincides with negative mass balance in the region . During this period all nine glaciers examined have retreated significantly . 
