Lewis Fork Wilderness, Protected wilderness area in Mount Rogers National Recreation Area, Virginia.

Lewis Fork Wilderness is a protected forest area within the Mount Rogers National Recreation Area that features dense woodland and varying elevations throughout its landscape. The terrain transitions from broadleaf trees in lower sections to evergreen forests where the land rises.

Congress designated Lewis Fork Wilderness in 1984 under the Eastern Wilderness Act, not a Virginia state law. The designation covers 6,076 acres managed by the Forest Service through the Mount Rogers National Recreation Area. It is one of the areas forming the Mount Rogers Cluster of protected land in the Southern Blue Ridge.

The Appalachian Trail enters and leaves the wilderness repeatedly, covering 5.5 miles within its borders. Trailheads sit near Elk Garden to the south and Grayson Highlands State Park to the north. The other paths, such as the Mount Rogers Trail and Lewis Fork Trail, are unblazed.

Most trails here carry no blazes; only the Pine Mountain Trail is marked, with blue blazes. The Appalachian Trail enters and leaves the wilderness for a total of 5.5 miles, with trailheads near Elk Garden to the south and Grayson Highlands State Park to the north. Motor vehicles, mountain bikes and motorized equipment are prohibited, groups are limited to ten people, and camping is restricted.

Lewis Fork is a Class I stream, the highest water-quality class Virginia assigns to wild trout streams; Charlies Branch, Daves Branch, Grindstone Branch and Helton Creek are Class II. The wilderness also holds cove forests, northern hardwood forests on upper slopes and aquifer-fed seeps. On the summit, Fraser firs are declining from infestation by the balsam woolly adelgid, an exotic insect pest.