One of my favorite maps of Portland, this reproduction of the Survey Map of 1852 offers not only development and trails, but information on soils, disappeared streams, topographic and other natural features. The map used to be available via a link to the BES website, but I can’t seem to place it at the moment.
A couple of details:
First, showing the area of current downtown, with natural features of Mt. Tabor and Ross Island. Note the curving depression of Sullivan’s Gulch still in full flow, replaced by the current routing of Interstate 5.
Second, focusing on North Portland, including Swan Island, Smith & Bybee Lakes, Forest Park, and the prominant eyebrow of the overlook ridge.