3 blocks. Streets named because they parallel the meridian In Whatcom County, Washington, Guide Meridian Road (State Route 539) is named after the Guide Meridian between R2E and R3E, 12 miles east of the Willamette meridian. In Newberg, Meridian Street is several miles west of the Willamette meridian. East–West streets and the baseline Streets named because they follow the baseline Baseline Road in Tillamook, Washington, Hood River, Gilliam, and Morrow counties all follow or start at the Willamette baseline. Other streets that follow the baseline Stark Street in east Portland and Washington County follows the Willamette baseline. Streets named because they parallel the baseline Division Street in Portland and Section Line Road in East Multnomah County follow the division between the first and second rows of square-mile sections south of the Willamette baseline. See also List of principal and guide meridians and base lines of the United States References External links Willamette Stone State Heritage Site Photographs of the stone, published 1959 (via Google Books) 1851 establishments in Oregon Territory Geography of Portland, Oregon Historic surveying landmarks in the United States History of Portland, Oregon Circles of latitude Meridians (geography) Monuments and memorials in Portland, Oregon Obelisks in the United States Parks in Portland, Oregon State parks of Oregon