The plateau that contains the Indian Heaven Wilderness features forests, which are predominantly made up of Pacific silver fir, noble fir, and subalpine fir trees, though there are also Western red cedars, mountain hemlock, grand firs, and Engelmann spruce. Other flora found in the vicinity include an understory of huckleberry plants and beargrass, in addition to colorful wildflowers; vine maples; flowering plants such as blueberry, heather, vanilla leaf, and false hellebore; and aromatic wintergreen. Many of the area's lakes get stocked with trout species like cutthroat, rainbow, and brook trout. Amphibians such as frogs can be found in the wilderness, while terrestrial animals in the area include deer, elk, and American black bears. Because of the abundance of mosquitoes within the vicinity, Indian Heaven is sometimes informally referred to as Insect Heaven.