| Trempealeau Mountain State Natural Area | |
| Map: | USA Wisconsin#USA |
| Relief: | 1 |
| Location: | Trempealeau, Wisconsin, United States |
| Coordinates: | 44.0214°N -91.4942°W |
| Area Acre: | 90 |
| Established: | 2002 |
Trempealeau Mountain State Natural Area is a Wisconsin Department of Natural Resources-designated State Natural Area consisting of a 425-foot conical rock mound surrounded on three sides by the Mississippi and Trempealeau Rivers. It is one of only 3 solid rock islands along the entire Mississippi River.[1]
Trempealeau Mountain State Natural Area is located in western Trempealeau County approximately 2miles southwest of Trempealeau within Perrot State Park. Access is via the Mississippi and Trempealeau Rivers.[2]
Trempealeau Mountain is mostly wooded, dominated by black and white oak and basswood. In a hollow on the southeast-facing side, red oaks are found mixed with patches of interrupted ferns. On the cooler northeast-facing slopes, sugar maple and basswood dominate. The dry south-facing slopes contain small patches of dry prairie with big blue-stem, needle grass, side-oats grama, hairy grama, white and purple prairie-clover, prairie larkspur, and partridge pea. Numerous Native American mounds, burial sites, and habitation sites make this a rich archeological site. French explorers were among the first Europeans to explore the area and the name Trempealeau comes from the French, “la montagne qui trempe à l’eau” meaning “the mountain whose foot is bathed in water”.