The oak-and-pine vegetation of North Fork Mountain contrasts strongly with the more diverse vegetation of the nearby mountains just west of the North Fork River, such as Spruce Mountain and the Allegheny Front, which receive considerably more rainfall. The lower slopes of those mountains are covered by mixed Appalachian hardwood forests dominated by sugar maple (Acer saccharum), beech (Fagus grandifolia), and yellow birch (Betula alleghaniensis), with red spruce (Picea rubens) abundant at higher elevations. Fraser magnolia (Magnolia fraseri) occurs on the slopes of the Allegheny Front, becoming abundant westward, but is not known from North Fork Mountain.