Hartley Fort State Preserve, Archaeological state preserve in New Albin, Iowa, US.
Hartley Fort State Preserve is an archaeological site along the Upper Iowa River near New Albin, Iowa. The property covers about 2 acres and sits approximately 80 feet (24 meters) above the river, where the remains of a fortified prehistoric village with palisades, ditches, and earth embankments are located.
Archaeological investigations in the late 1800s first documented the site and its ancient structures. The findings revealed a fortified village that existed around 1000 AD, with defensive features that protected the community.
Native American communities built nine cone-shaped mounds here as part of burial and ceremonial practices that connected them to the land. These structures reveal how the Woodland and Oneota peoples organized their spiritual life and remembered their ancestors.
The preserve is privately owned and access is restricted to protect the archaeological discoveries and ancient structures from disturbance. Visitors should check ahead for current access conditions before planning a visit to the site.
Artifacts found here show trade connections and cultural exchange between the Mill Creek culture from northwest Iowa and the Late Woodland culture from southern Wisconsin. This evidence reveals how distant communities interacted and shared influences across the region.
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