Rib Mountain State Park

Rib Mountain State Park offers hiking on 13 miles of trails, including the summit trails to the observation towers with their panoramic views across central Wisconsin, ridge trails through the quartzite outcrops, and loop hikes at various lengths and difficulties. In winter, Granite Peak ski area operates on the mountain’s eastern face, with downhill skiing and snowboarding. Picnicking, photography, bouldering on the quartzite outcrops and enjoying the summit views are year-round draws. The park is a favorite of Wausau-area hikers and a fine destination for those who wish to stand atop one of the highest points in Wisconsin and look out across the central Wisconsin plain.

Fall is the finest season for summit views and hiking at Rib Mountain, when the hardwood forests of the slopes and the surrounding central Wisconsin countryside color brilliantly, and the observation tower views stretch for miles in the crisp autumn air. Spring brings wildflowers to the mountain slopes and fresh foliage. Summer is pleasant for hiking, though the summit can be warm and sunny. Winter brings the ski season. The park is open year-round; fall for color and views is the prime scenic season. The observation tower view at any season — looking out across the vast central Wisconsin landscape from atop ancient Precambrian quartzite — is the defining experience.

Rib Mountain has been a landmark in central Wisconsin since the earliest human habitation of the region — its prominence above the surrounding plain made it a reference point for indigenous peoples and early European settlers alike. Wisconsin established Rib Mountain State Park in 1928 to protect the geological landmark and provide public access to its scenic summit. The mountain’s quartzite was historically mined in modest amounts. The Civilian Conservation Corps improved park infrastructure in the 1930s, and a ski area on the eastern face has operated for decades, making the mountain both a natural landmark and a winter recreation destination for the Wausau region.

Rib Mountain is a monadnock — an isolated hill of hard rock that has resisted erosion and stands above the surrounding plain — composed of Precambrian quartzite estimated to be approximately 1.5 billion years old, among the oldest exposed rock in Wisconsin and the Midwest. The quartzite is the metamorphosed remnant of ancient sandstone, hardened by heat and pressure into one of the most resistant rock types. The mountain’s prominence reflects the extreme hardness of the quartzite compared to the softer rocks around it, which glaciers and erosion have worn away. The last Ice Age glaciers largely flowed around and over the mountain, leaving its hard quartzite core intact as a prominent ridge in the central Wisconsin landscape.

The forested slopes and rocky summit of Rib Mountain host white-tailed deer, wild turkeys, foxes, and a rich community of birds, including hawks and falcons that use the summit ridge as a migration corridor and thermal soaring site, woodpeckers in the mature forest, and a diversity of songbirds in the mixed hardwood and quartzite-outcrop habitat. The mountain’s elevation and rocky summit create a somewhat cooler, drier habitat that supports plant and animal communities not found in the surrounding lowlands. The views from the summit observation tower allow wildlife watching over a vast sweep of central Wisconsin landscape.

Rib Mountain State Park protects an unusual ecological community centered on the ancient quartzite monadnock — a landscape of rocky outcrops, thin soils, stunted oaks and pines on the exposed ridge, and richer mixed hardwood forest on the sheltered slopes. The exposed quartzite supports specialized rock-cap mosses, lichens and ferns, and the ridge microclimate creates habitats distinct from the surrounding lowland forest. The mountain’s prominence and its rocky, thin-soiled summit make it an ecological outlier in central Wisconsin, supporting species adapted to the challenging conditions of the ancient quartzite monadnock.

Rib Mountain is a beloved natural landmark and a defining feature of the Wausau area’s identity — the highest point for miles in central Wisconsin and one of the most recognizable geological features in the state. As both a state park with hiking and summit views and a ski destination in winter, the mountain blends natural heritage and active recreation in a way that has made it a centerpiece of Wausau-area outdoor life for generations. Its billion-and-a-half-year-old quartzite, visible in the rocky outcrops along the summit trail, connects visitors to the deep geological history of central Wisconsin.

Rib Mountain State Park is immediately west of Wausau, Wisconsin, off State Route 51 and Rib Mountain Drive, with the park entrance easily accessible from the Wausau area. A Wisconsin state park vehicle admission sticker is required for day use. The park offers parking, picnic areas, hiking trailheads, and access to the summit observation tower. In winter, the Granite Peak ski area operates on the mountain (separate from the state park; ski area fees apply). The park is open year-round. Check the Wisconsin Department of Natural Resources for admission, trail conditions and current access before visiting.

The Wisconsin Department of Natural Resources manages Rib Mountain State Park, protecting the ancient quartzite monadnock, its rocky summit, forest habitats and geological features. Visitors help by staying on designated trails to protect the thin soils and fragile rock-cap vegetation on the summit ridge, not removing or defacing the ancient quartzite, packing out all trash, and respecting the park’s natural character. Protecting the mountain’s geological and ecological integrity sustains one of central Wisconsin’s most significant and beloved natural landmarks.

Rib Mountain’s summit trails involve rocky, sometimes uneven terrain with exposed quartzite outcrops — wear sturdy footwear with good grip, watch footing on the rocky sections, and keep back from exposed ledges. The summit is exposed to weather, which can change rapidly in central Wisconsin; carry a layer for wind and rain. In winter, the summit and trails can be icy — carry traction devices for winter hikes. The ski area (Granite Peak) operates its own safety rules during the winter season. Carry water, especially on sunny summer days when the exposed quartzite summit can be warm.

A Wisconsin state park vehicle admission sticker is required for day use. Stay on designated hiking trails and back from exposed ledges. Dogs must be leashed in the park. Fires are allowed only in designated fire rings in picnic areas. No removing or defacing rock, plants or geological features. The Granite Peak ski area on the eastern face is a separate commercial operation with its own ticketing and rules. Drones generally require authorization. Pack out all trash. Check the Wisconsin Department of Natural Resources for current rules and trail conditions before visiting.

The city of Wausau, with its downtown arts scene and the nearby Dells of the Eau Claire County Park, the Nine Mile Recreation Area (cross-country skiing and hiking), and the Eau Claire River corridor, surrounds the mountain. The Chequamegon-Nicolet National Forest lies to the north. Rib Mountain anchors the Wausau area’s outdoor recreation scene, easily combined with a visit to the Dells of the Eau Claire for a full day of central Wisconsin geological wonders, or with the broader northwoods landscape of Chequamegon for a multi-day exploration of north-central Wisconsin.

Hike to the summit observation tower for the finest views in central Wisconsin — a 360-degree panorama across the central Wisconsin plain, with the Wausau area visible below and the landscape stretching to the horizon in every direction from atop 1.5-billion-year-old quartzite. Visit in fall for brilliant color in the hardwood forest on the slopes and across the surrounding countryside. Wear sturdy shoes for the rocky summit trail, bring a layer for wind at the top, and combine the mountain with a visit to the nearby Dells of the Eau Claire for a full day of central Wisconsin geology and scenery. Buy a park sticker before arriving.