Project revitalizes winemaking landmark with rich history dating back to 1906
MIDDLE BASS ISLAND, Ohio,: The Ohio Department of Natural Resources (ODNR) held a ribbon-cutting ceremony to celebrate the restoration of the historic Lonz Mansion at Middle Bass Island State Park Friday, November 1, 2024. The mansion, a cornerstone of Ohio’s winemaking history and the Lake Erie Islands’ heritage, has been revitalized while carefully preserving its historic charm.
“The Lonz Mansion is a vital part of Ohio’s history, and we are proud to preserve and transform it into an educational experience for all park visitors,” said ODNR Director Mary Mertz. “This project honors the past while creating new opportunities for visitors to experience the rich history and beauty of Middle Bass Island.”
The restoration allows parkgoers to learn about the history of the Lonz family and the winery with a self-guided tour on the first floor of the mansion. The second floor provides a unique opportunity for visitors to stay overnight in a piece of Ohio’s history while enjoying the island’s natural beauty.
The $3.9 million project included a full exterior renovation, a new roof, modern plumbing and HVAC systems, and various structural improvements while maintaining the historic character.
The story of Lonz Mansion began in 1906, when August Schmidt, a well-known winemaker from Sandusky, purchased the Golden Eagle Winery and Dance Pavilion property after the original owners faced financial hardship. Schmidt built the stately 60-room Hillcrest Hotel, which once stood near the current pavilion. That same year, he constructed a four-bedroom home in the popular “Queen Anne” style for his family—a design known for its asymmetrical façade, large porch, and tower.
When George Lonz and his wife Fannie purchased the property in 1926, they turned the mansion into the center of community life. The home, built by Schmidt, became a hub of activity, especially after Prohibition ended, and the Lonz Winery flourished. The family resided in the mansion until George Lonz’s death in 1969. Though it later served as housing for seasonal employees, the “big house” has remained a symbol of the region’s winemaking heritage and Ohio’s cultural history.
Acquired by the State of Ohio in 2001 along with 124 acres of Middle Bass Island, the mansion and winery are now part of Middle Bass Island State Park. In addition to these historic locations, the park also features a campground, picnic shelter, and a 184-slip marina, making it a destination for both history lovers and outdoor enthusiasts alike.
The ODNR Division of Parks and Watercraft provides exceptional outdoor recreation and boating opportunities by balancing outstanding customer service, education, and conservation of Ohio’s 76 state parks and waterways.
In 2024, join ODNR as we celebrate 75 years of protecting Ohio’s natural resources and providing outstanding and award-winning recreational opportunities.
ODNR ensures a balance between wise use and protection of our natural resources for the benefit of all. Visit the ODNR website at ohiodnr.gov.