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Boise Meridian Initial Point Celebration: Surveying the Past, Mapping the Future

Idaho
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Idaho State Office
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Event Location

Old Idaho Penitentiary
2445 Old Penitentiary Rd.
Boise, ID 83712
United States

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Event Description

BLM Idaho has partnered with the Idaho State Historical Society, Idaho Public Television, Idaho Department of Education, National Society of Professional Surveyors (NSPS), Idaho Society of Professional Surveyors (ISPLS), the Idaho Transportation Department, and Ada County Highway District for an event celebrating America’s 250th anniversary: the Boise Meridian Initial Point Celebration, scheduled for May 1st and 2nd, 2026.  BLM Idaho is proud to celebrate America’s 250th anniversary by honoring cadastral surveyors—the professionals who have defined and preserved the boundaries of our public lands for generations. This profile is the fourth in a series celebrating BLM cadastral surveyors in the lead-up to the anniversary event in May. 

Boise Meridian Initial Point Celebration: Surveying the Past, Mapping the Future. Includes BLM logo, American Flags, and the Initial Point marker.
Boise Meridian Initial Point Celebration: Surveying the Past, Mapping the Future
 
This America 250 signature event celebrates the foundational moment in 1867 when Surveyor General Lafayette Cartee and his team fixed Idaho’s principal meridian and baseline at a prominent volcanic butte south of Boise. That single “Initial Point” launched the Public Land Survey System across nearly 54 million acres, enabling the orderly division of land into the familiar grid that still defines property boundaries, farming, ranching, towns, and public lands today.

The celebration highlights Idaho’s surveying heritage, multigenerational stewardship of the land, and contributions from agriculture, natural resource management, technology, and education. At the same time, it thoughtfully recognizes the profound effects of federal land policies and treaties on tribal nations whose histories on this landscape long predate the survey lines.

Attendees can enjoy live surveying demonstrations, lecture-style talks and discussions, food and beverage vendors, and informative partner booths. 

It’s a day that bridges past and future, showing how lines drawn on a map continue to shape Idaho’s identity and communities.
 

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The BLM manages about 245 million acres of public land located primarily in 12 western states, including Alaska, on behalf of the American people. The BLM also administers 700 million acres of sub-surface mineral estate throughout the nation. Our mission is to sustain the health, diversity, and productivity of America’s public lands for the use and enjoyment of present and future generations.