Interstate State Park sits on the St. Croix National Scenic Riverway at 971 feet elevation, where the Dalles gorge and Wisconsin's deepest glacial potholes mark the edge of ancient ice sheets. The park's 90 campsites range from rustic tent spots to electric hookups, with fees unknown. Established in 1900, this is Wisconsin's oldest state park.
Two main camping areas: a developed north loop with electric hookup sites (reported 34 electric sites) and a rustic south campground with non-electric tent sites, fire rings and picnic tables.
Historical Significance
Wisconsin's oldest state park, established in 1900. The Ice Age Interpretive Center presents films and exhibits about 10,000 years of glacial history, interpreting the ancient ice sheets that carved the Dalles and potholes.Weather and SeasonsFall offers crisp, clear days and peak foliage in early October, when daytime highs reach the mid-40s to low-60s°F and nights drop into the 30s and 40s. The gorge and potholes light up for hiking and photography. Water levels are lower and calmer than spring, making river views and quiet paddling especially pleasant. Bugs are minimal. Summer brings activity and mosquitoes. Winter turns the Dalles quiet and frosted. Midweek in October is noted as particularly quiet.
Natural Features and SceneryThe Dalles gorge cuts a steep-walled channel through basalt cliffs, carved by glacial meltwater thousands of years ago. Potholes swirl deep into solid rock along the trails. Lake O' the Dalles runs alongside the St. Croix River, edged by wooded bluffs and rocky overlooks. The Potholes Trail draws the most attention, winding through the park's signature geological features. Trails range from easy riverside paths to rugged, rock-strewn routes that climb to views over the gorge. A sandy beach provides lake access.
Geological RegionLocated on the St. Croix National Scenic Riverway; features the Dalles gorge, glacial potholes and other Ice Age glacial features.
Scenic ViewsScenic overlooks of the St. Croix River, the Dalles gorge, rocky river bluffs, Lake O' the Dalles and river valley vistas.