The primary tributary of the Colorado River, drainage of the region where Wyoming, Colorado, and Utah join. The confluence of the rivers is near Moab, Utah.

Historically, the Colorado River began where the Green and Grand Rivers joined ... then politics got involved in 1921 when a Colorado Representative petitioned to have the Grand River renamed to the Colorado (over the objections of representatives of Wyoming and Utah as well as the USGS).

John Wesley Powell took a party down the river by boat (and through the Grand Canyon) in 1869 and named most of the features along the river(s)

Not that this fellow cares a whit about any of this.

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