Tower Hill

Tower Hill State Park is a 77-acre historic park beautifully situated on a bluff above the Wisconsin River near Spring Green in Iowa County, Wisconsin. The park preserves and interprets one of the most unique industrial heritage sites in the state: a shot tower and smelter complex constructed in the 1830s during Wisconsin's lead mining era. The park takes its name from the distinctive shot tower, where lead shot was manufactured by dropping molten lead from the clifftop through a 120-foot shaft, the droplets forming perfect spheres as they fell into a water-filled tank at the bottom. Located within the Driftless Area of southwestern Wisconsin, a region that escaped glaciation during the last ice age, Tower Hill features dramatic sandstone bluffs, scenic views of the Wisconsin River, and a landscape that has remained largely unchanged for thousands of years. The seasonal park operates from mid-May through Columbus Day weekend, offering camping, hiking, picnicking, and access to the historic shot tower and smelter house.

Tower Hill State Park and the surrounding Driftless Area landscape support a diverse wildlife community adapted to the region's unique topography of bluffs, valleys, and river corridors. The Wisconsin River, flowing past the base of the park's bluffs, provides habitat for bald eagles, great blue herons, and belted kingfishers. Turkey vultures and red-tailed hawks soar on the thermal currents rising along the sandstone cliffs. The park's forests shelter white-tailed deer, wild turkeys, gray squirrels, and various songbirds including wood thrushes, scarlet tanagers, and ovenbirds. Pileated woodpeckers, with their distinctive calls and rectangular excavations, are commonly seen in the mature trees. The adjacent Tower Hill Bottoms State Natural Area protects a significant floodplain forest along the Wisconsin River, harboring additional species diversity. The bluffs themselves provide nesting sites for cliff-dwelling birds and habitat for various reptiles including five-lined skinks and timber rattlesnakes, the latter a species of conservation concern found in the Driftless Area's rocky habitats.

The vegetation of Tower Hill State Park reflects its position within the Driftless Area and the varying moisture and soil conditions created by the bluff topography. The sandstone bluffs support dry oak forest communities, with white oak, red oak, and shaggy-bark hickory dominating the canopy. On the rocky outcrops and thin-soiled clifftops, drought-tolerant species including eastern red cedar and various prairie plants find footholds. The forested slopes feature a mix of deciduous species including basswood, sugar maple, and black cherry, with an understory of flowering dogwood, viburnums, and various ferns. Spring wildflowers including bloodroot, hepatica, and Dutchman's breeches carpet the forest floor before the canopy leafs out. The adjacent Tower Hill Bottoms Natural Area preserves an excellent example of undisturbed floodplain forest featuring silver maple, river birch, American elm, green ash, and swamp white oak, with buttonbush, prickly ash, and silky dogwood in the shrub layer. This diversity of plant communities, from dry blufftop to moist bottomland, creates varied habitats for wildlife.

Tower Hill State Park occupies a dramatic position within Wisconsin's Driftless Area, a region that remained ice-free during the last several glacial periods while surrounding areas were covered by ice sheets. The bluffs along the Wisconsin River are formed of Jordan Sandstone, a Cambrian-age rock approximately 500 million years old, deposited when this region lay beneath a shallow sea. The soft, easily eroded sandstone has been carved by the Wisconsin River over millions of years, creating the steep cliffs and scenic overlooks that characterize the park. From the top of the shot tower bluff, a 60-foot sheer drop leads to sloping cliffs that continue 180 feet down to the riverbank below. This geological setting made the site ideal for shot tower construction, as the natural vertical drop could be extended by a mineshaft. The Driftless Area's unglaciated landscape features bedrock-controlled topography with narrow, steep-sided valleys and prominent bluffs, creating dramatically different terrain than the gently rolling glaciated landscapes found elsewhere in Wisconsin. Lead ore deposits in the Driftless Area's Galena dolomite drove the mining boom that led to the shot tower's construction.

Tower Hill State Park experiences a humid continental climate with four distinct seasons characteristic of southwestern Wisconsin. Summers are warm and humid, with average high temperatures in the mid 80s Fahrenheit and occasional heat waves pushing temperatures into the 90s. The park's position above the Wisconsin River creates a pleasant microclimate, with river breezes moderating summer afternoon temperatures on the bluff. Winters are cold, with average highs in the upper 20s and lows around 10 degrees Fahrenheit, though the park is closed during winter months. Annual precipitation averages approximately 33 inches, with the majority falling during the growing season from May through September. Thunderstorms are common in summer, occasionally producing heavy rainfall and dramatic lightning displays over the river valley. Spring brings warming temperatures and wildflower blooms beginning in April. Fall is particularly scenic, with the hardwood forests displaying brilliant foliage in late September through October, and the park's elevated position providing views of the colorful Wisconsin River valley below.

The Tower Hill area has witnessed a rich succession of human history spanning thousands of years. The Driftless Area has been continuously inhabited since shortly after the last ice age, with Native American peoples including ancestors of the Ho-Chunk Nation utilizing the river corridors and uplands for hunting, fishing, and gathering. The area was first seen by European explorers in 1673, when Pere Jacques Marquette and Louis Joliet passed down the Wisconsin River during their historic expedition. Lead mining by Native Americans and later European-Americans transformed the region beginning in the late 18th century, as the extensive lead ore deposits in southwestern Wisconsin and northwestern Illinois attracted miners and speculators. In 1830, businessman Daniel Whitney from Green Bay recognized the strategic value of a steep bluff near the town of Helena for manufacturing lead shot. After delays caused by the Black Hawk War of 1832, Whitney's shot tower was completed in 1833, operating until 1860 when competition and declining lead prices made the operation unprofitable. The town of Helena, once a thriving river port, gradually declined and eventually disappeared.

Tower Hill State Park's history as a public recreation area began in 1889 when Reverend Jenkin Lloyd Jones, a prominent Unitarian minister and uncle of architect Frank Lloyd Wright, purchased the shot tower site and surrounding land. Jones established the Tower Hill Pleasure Company as a recreational and educational retreat, hosting summer gatherings for religious and intellectual discussions in this scenic setting. Upon Jones's death, his widow donated the 77-acre property to the State of Wisconsin, and in 1922 it became Tower Hill State Park. The state has since preserved and interpreted the historic shot tower and smelter house, reconstructing the wooden shaft and displays that show how lead shot was manufactured when the tower was in operation. The park was developed primarily for day use and camping, with trails providing access to the historic structures and scenic overlooks. Listed on the National Register of Historic Places, the shot tower complex represents a unique example of 19th-century industrial technology and Wisconsin's lead mining heritage. The park continues to serve as both a recreational destination and an outdoor museum interpreting this fascinating chapter of state history.

The Shot Tower and Smelter House Loop is Tower Hill State Park's signature attraction and most popular trail, measuring approximately one mile in length with 170 feet of elevation gain. The trail climbs from the campground area to the historic smelter house atop the bluff, where interpretive displays explain how lead ore was melted and poured down the 120-foot shaft to form shot. Visitors can peer down the shaft and visit the reconstructed smelter house, experiencing this unique piece of industrial heritage. From the blufftop, scenic overlooks provide panoramic views of the Wisconsin River valley below. A connecting trail descends to a canoe landing on the Wisconsin River, popular with paddlers exploring this scenic stretch of waterway. The Lower Wisconsin State Riverway, of which the park is a part, offers excellent canoeing and kayaking opportunities along one of the longest free-flowing rivers in the Midwest. Additional short trails explore the park's oak woodlands and provide access to picnic areas. Interpretive signage throughout the park tells the story of the lead mining era and the shot manufacturing process.

Tower Hill State Park is located approximately three miles south of Spring Green on County Highway C, in Iowa County. The park is easily accessible from U.S. Highway 14 and is within a two-hour drive of Madison, Milwaukee, and the Twin Cities. As a seasonal park, Tower Hill operates from mid-May through Columbus Day weekend each year. The park offers 15 tent and RV campsites on a first-come, first-served basis, with pit toilets and water available nearby. A group camp can accommodate organized groups with advance reservation. Day-use facilities include a picnic area with shelter and scenic views of the Wisconsin River. A canoe landing provides river access for paddlers. The visitor contact station provides information and interpretive materials. The nearby town of Spring Green offers restaurants, lodging, and cultural attractions including Taliesin, Frank Lloyd Wright's famous architectural studio and home. House on the Rock and American Players Theatre are also located nearby. A Wisconsin State Park vehicle admission sticker is required for entry.

Tower Hill State Park contributes to conservation efforts in the Lower Wisconsin River valley, protecting a portion of the scenic bluffs and woodlands that characterize this unglaciated landscape. The park works in coordination with the Lower Wisconsin State Riverway, a 92-mile corridor of protected lands along one of the longest free-flowing rivers in the Midwest. Adjacent to the park, the Tower Hill Bottoms State Natural Area protects 400 acres of undisturbed floodplain forest, representing one of the finest examples of this increasingly rare ecosystem type in Wisconsin. Together, these protected areas provide habitat connectivity for wildlife moving along the river corridor. The DNR manages the park's forests to maintain ecological health while preserving the scenic character that has attracted visitors for over a century. Invasive species management targets threats including garlic mustard, Japanese barberry, and bush honeysuckles that can degrade forest understory diversity. Historic preservation efforts ensure that the shot tower and smelter house remain intact for future generations to experience and understand Wisconsin's lead mining heritage. Educational programming connects visitors with both the natural and cultural history of this significant site.