Editing Grand Mound, Washington (section)

==Geography==
Grand Mound is in the southern part of Thurston County, near the county line with [[Lewis County, Washington|Lewis County]], immediately north of [[Centralia, Washington|Centralia]]. [[Interstate 5 in Washington|Interstate 5]] and [[U.S. Route 12]] serve the community, with the latter leaving Interstate 5 at the Grand Mound exit to head west to [[Grays Harbor]]. According to the [[United States Census Bureau]], the CDP has a total area of {{convert|3.93|sqmi|km2}}, all of it land. It is located on Grand Mound Prairie, which was named after a {{convert|125|ft|adj=on}} tree-covered hill in the area, which was the largest of several similar mounds in the area.<ref name=federal/>

Prairie Creek is the only stream within the town's limits. It flows into the nearby [[Chehalis River (Washington)|Chehalis River]], and the confluence of the two is located immediately southwest of the town. Scatter Creek can be found just north of Grand Mound, where it flows west through the [[Scatter Creek Unit|Scatter Creek Wildlife Recreation Area]] and makes its way to its confluence with the Chehalis River, just south of nearby [[Rochester, Washington|Rochester]].

Just north of Grand Mound is the [[Scatter Creek Unit]], a 915-acre (370.29-hectare) wildlife reserve which contains one of the few remaining areas of south Puget Sound prairie.