Willamette Stone, Survey marker in Northwest Portland, Oregon, United States.
A stainless steel marker and bronze plaque stand at the intersection of the Willamette meridian and baseline in a forested state heritage site.
John Preston, the first Surveyor General of Oregon Territory, placed a cedar stake at this location in 1851 to establish property measurements.
The marker forms the foundation for all property measurements in Oregon and Washington states, influencing regional development patterns since the 1850s.
Visitors can reach the site via Northwest Skyline Boulevard, with access to parking facilities and interpretive trails from 7:00 AM to 8:00 PM.
The meridian extends from Canada to California while the baseline stretches from Idaho to the Pacific Ocean, creating a coordinate system for two states.
Location: Oregon
GPS coordinates: 45.51972,-122.74389
Latest update: May 20, 2025 18:47
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