Maintop Mountain is a mountain in Nelson County, Virginia. The mountain is a peak on a spur off the main Blue Ridge Mountains, about 2 miles (3 km) east of Elk Pond Mountain, and about 3.5 miles (5.5 km) west of The Priest. The mountain is located in the George Washington National Forest.Maintop Mountain stands within the watershed of the Tye River, which drains into the James River. The northwest side of Maintop Mountain drains into Mill Creek, thence into the South Fork of the Tye River.