Original sentence: Mount Callaghan is an inactive volcano located east of the headwaters of the Squamish River, just northeast of the Powder Mountain Icefield and just south of the Pemberton Icefield in the Sea to Sky Country of southwestern British Columbia, Canada, abou 20km directly west of the Resort Municipality of Whistler
Edited sentence: Mount Callaghan is a dormant volcano located east of the headwaters of the Squamish River, just northeast of the Powder Mountain Icefield and just south of the Pemberton Icefield in the Sea to Sky Country of southwestern British Columbia, Canada, abou 20km directly west of the Resort Municipality of Whistler