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John Mullan (1830-1909) (After the Road)

John Mullan (1830-1909) (After the Road) is an Idaho historical marker in Benewah County, dedicated 2025.

SH-5, milepost 17.87

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John Mullan won acclaim as a young Army lieutenant. His 625-mile road, the Northwest’s first engineered highway, is a National Historic Civil Engineering Landmark. Towns, schools, and streets in three states bear his name. After roadbuilding, Mullan’s life proved less gratifying. In 1863, he resigned from the Army and attempted unsuccessfully to gain President Lincoln’s appointment as Idaho’s first territorial governor. He then failed as a Walla Walla businessman and as partner in a Boise-to-California stage line. He finally found success as a California lawyer, but eventually lost his fortune. He died penniless in 1909, the year automobiles first traveled his road.

Slide toward Today to fade the historical sheet and see the modern map underneath.

David Rumsey Map Collection, Stanford Libraries

Historical maps covering this location

Rocky Mountains to Puget Sound, 1861, covering the location of John Mullan (1830-1909) (After the Road), with a pin at the marker's coordinates
Rocky Mountains to Puget Sound, 1861, covering this location. David Rumsey Map Collection, Stanford Libraries. The pin is ours, placed from the marker's coordinates.
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What that marker records spans 1777 to 1789, overlapping William Gabby's years there.

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The Idaho Highway Historic Marker program is administered by the Idaho Transportation Department (ITD) in partnership with the Idaho State Historical Society (ISHS). Marker texts and locations are reproduced with the written permission of both offices.
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