Lewis Mountain, also known as Onteora, is a historic home located near Charlottesville, Albemarle County, Virginia.

The house is a three-part plan granite dwelling, consisting of a nearly square center section flanked by one-story, flat-roofed wings in the Colonial Revival style.

The steeply sloped property features a landscape designed by Warren H. Manning with a series of three terraces with tall dry-laid stone retaining walls.

[3] An urban legend states that the house, which overlooks the campus of the University of Virginia (whose students are nicknamed "Hoos"), inspired Dr. Seuss to create the character of the Grinch, who scornfully looks down upon the "Whos" from his mountaintop residence.

This article about a property in Albemarle County, Virginia on the National Register of Historic Places is a stub.