Cityscape

Panorama of downtown Portland in the day. Hawthorne Bridge viewed from a dock on the Willamette River near the Oregon Museum of Science and Industry. Panorama of downtown Portland at night. View from across the Willamette River in SE Portland. See also: Architecture of Portland, Oregon, List of tallest buildings in Portland, Oregon, Downtown Portland, and Neighborhoods of Portland, Oregon The "Five Quadrants" of Portland

Portland straddles the Willamette River near its confluence with the Columbia River. The denser and earlier-developed west side is mostly hemmed in by the nearby West Hills (Tualatin Mountains), though it extends over them to the border with Washington County. The flatter east side fans out for about 180 blocks, until it meets the suburb of Gresham. Rural Multnomah County lies farther east. In 1891 the cities of Portland, Albina, and East Portland were consolidated, and duplicate street names were given new names. The "great renumbering" on September 2, 1931, standardized street naming patterns, and changed house numbers from 20 per block to 100 per block. It divided Portland into five sections: Southwest, Southeast, Northwest, North, and Northeast. Burnside St. divides north and south, and the Willamette River divides east and west. The river curves west five blocks north of Burnside and in place of it, Williams Ave. is used as a divider. The North section lies between Williams Ave. and the Willamette River to the west.

On the west side, the RiverPlace, John's Landing and South Waterfront Districts lie in a "sixth quadrant" where addresses go higher from west to east toward the river. This "sixth quadrant" is roughly bounded by Naito Parkway and Barbur Boulevard to the west, Montgomery Street to the north and Nevada Street to the south. East-West addresses in this area are denoted with a leading zero (instead of a minus sign). This means 0246 SW California St. is not the same as 246 SW California St. Many mapping programs are unable to distinguish between the two.

Parks and gardens Tom McCall Waterfront Park seen from the north Main article: List of parks in Portland, Oregon

Parks and greenspace planning date back to John Charles Olmsted's 1903 Report to the Portland Park Board. In 1995, voters in the Portland metropolitan region passed a regional bond measure to acquire valuable natural areas for fish, wildlife, and people. Ten years later, more than 8,100 acres (33 km2) of ecologically valuable natural areas had been purchased and permanently protected from development.

Portland is one of only three cities in the contiguous U.S. with extinct volcanoes within its boundaries (along with Jackson, Mississippi and Bend, Oregon). Mount Tabor Park is known for its scenic views and historic reservoirs.

A panoramic view of the International Rose Test Garden

Forest Park is the largest wilderness park within city limits in the United States, covering more than 5,000 acres (2,023 ha). Portland is also home to Mill Ends Park, the world's smallest park (a two-foot-diameter circle, the park's area is only about 0.3 m2). Washington Park is just west of downtown, and is home to the Oregon Zoo, the Portland Japanese Garden, and the International Rose Test Garden.

Tom McCall Waterfront Park runs along the west bank of the Willamette for the length of downtown. The 37-acre (15 ha) park was built in 1974 after Harbor Drive was removed and now hosts large events throughout the year. Portland's downtown features two groups of contiguous city blocks dedicated for park space: the North and South Park Blocks.

Tryon Creek State Natural Area is one of three Oregon State Parks in Portland and the most popular; its creek has a run of steelhead. The other two State Parks are Willamette Stone State Heritage Site located in the West Hills and the Government Island State Recreation Area located in the Columbia River near Portland International Airport.