The Holtz Site in Bellaire, Michigan, on the bank of the Intermediate River, was a temporary Middle Woodland camp on what was once an island amid low, swampy ground. Excavations by Michigan State University in 1967 uncovered evidence of occupation dating to about AD 200 to 400, including five features such as a small hearth, pottery concentrations, and an area tied to hearth activity. Sherds from at least 11 vessels and several projectile points were recovered. The site indicates a short-term seasonal encampment, likely used by people who traveled north from southern Michigan, offering insight into Woodland-period movement and small-scale occupation in northern Michigan.