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This is the central 150 km² area of the 950 km² maps shown elsewhere. Jump Lake supplies water for the City of Nanaimo.

The Landsat photo is 1997.

Dots are burrows where marmots were born or hibernated between 1987 and 2001. Burrows in natural meadows (green) and clearcuts (yellow) are shown.

The land tenure is as of 1973. On Green Mtn., between Crown Zellerbach and MacMillan Bloedel lands, is "Block 1392", owned by Pacific Logging.