Flower Mound spreads over about 44 square miles of Eastern Cross Timbers woodland and prairie, with Grapevine Lake and Marshall Creek along its south side. Trees, lawns and lake moisture give ants, rodents and mosquitoes an easy foothold.
Flower Mound takes its name from a 12.5-acre hill about 50 feet tall, covered with bluestem grasses and wildflowers and cared for by the Mound Foundation. The town recorded 75,956 residents in 2020, mostly in Denton County with a small part in Tarrant County, at an elevation of 604 feet. It lies about 20 miles northwest of Dallas and 25 miles northeast of Fort Worth.
Grapevine Lake touches the town, and with Marshall Creek it forms much of the southern boundary. The Trinity River basin, the Eastern Cross Timbers and some blackland prairie all meet here. About 37 inches of rain falls in an average year, and 113 degrees is the highest temperature on record. Warm, wet, tree-covered ground attracts many household invaders.