Fort Lewis Mountain is a mountain which stretches from Ironto in Montgomery County, Virginia to Masons Cove in Roanoke County, Virginia. The rural community of Bradshaw is located in the narrow valley between the south slope of Catawba Mountain and the north slope of Fort Lewis Mountain. The south slope of the mountain faces the western Roanoke Valley and is directly across from Poor Mountain. Fort Lewis Mountain is separated from by a narrow gap formed by Masons Creek. Brushy Mountain stretches in the same southwest to northeast direction for several more miles into Botetourt County, Virginia. Another narrow gap separates Fort Lewis Mountain from Little Brushy Mountain, a small 1,926 foot high peak, which is located in Roanoke County just north of Salem, Virginia.