The Thumb is a Mountain located in Cassiar Land District, British Columbia.

• Latitude: 56° 9' 49'' North   (decimal: 56.1636111)
• Longitude: 126° 44' 49'' West   (decimal: -126.746944)
• Topography Feature Category: Mountain
• Geographical Feature: Mountain
• Canadian Province/Territory: British Columbia
• Location: Cassiar Land District
• Atlas of Canada Locator Map: The Thumb
• GPS Coordinate Locator Map: The Thumb Lat/Long