The Laramie River is a tributary of the North Platte River, approximately long, in the U.S. states of Colorado and Wyoming. The river was named for Jacques La Ramie, a fur trapper who visited the area in the early 19th century. Laramie County, Wyoming, the city of Laramie, and other geographical entities in the region have "Laramie" in their names.
In its upper reaches in Colorado, the river supplies water to the Cache La Poudre River via the Laramie–Poudre Tunnel. The tunnel, which is approximately long, was finished in 1911 as part of a larger irrigation project for northern Colorado.
Discharge
{| class="wikitable unsortable"
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|Yearly mean discharge
|Near Woods Landing
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|Near Bosler
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|Near Fort Laramie
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|Near Fort Laramie
|May
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