Alameda is one of NE Portland’s most prestigious neighborhoods, defined by its elevated setting atop the Alameda Ridge, sweeping views of downtown Portland and the Cascade Mountains, and quiet streets lined with stately historic homes. The name—from the Spanish for “tree-lined walkway”—perfectly describes what you’ll find here.   First platted in 1909 by the Alameda Land Company, the neighborhood was built on a geological wonder: Alameda Ridge, formed during the last ice age when Glacial Lake Missoula flooded the Willamette Valley, depositing sediment that created a ridge stretching six miles from Rocky Butte.