A History of Railroads in Clackamas County SEP28, 5:00 p.m. Lecture “A History of Railroads in Clackamas County” In this CCHS Lecture, presenter Michael Hall will give a history on the railroads of Clackamas County from a railroader’s perspective. Admission is $10 for non-members. Museum of the Oregon Territory, 211 Tumwater, Oregon City