Ardenwald-Johnson Creek (also called simply Ardenwald) is a neighborhood straddling the border between Portland (and Multnomah County) and Milwaukie (and Clackamas County), Oregon. It is recognized by both Portland's Office of Neighborhood Involvement as well as Milwaukie's Neighborhoods Program. Ardenwald was named in 1888 for Arden M. Rockwood, whose father platted the community. The last syllable of Rockwood is rendered in German and spliced onto the first name. The Tideman Johnson Natural Area (1940) is located along Johnson Creek in Ardenwald.