[2] The county obtains its name in memory of the United States President Abraham Lincoln.

Big Sandy and Rush Creeks ultimately drain into the Arkansas River.

Lincoln County is part of the 18th Colorado Judicial District — the state trial court of general jurisdiction — with judicial matters conducted in the Littleton and Centennial courthouses in Arapahoe County.

The name "Smoky Hill" comes from the appearance of the misty or smoky hills that the westward travelers viewed on their journey from Kansas and Nebraska Territories and Missouri toward the Colorado Gold Rush starting in 1858.

Parts of the trail can still be seen as a two-track road on the Eastern Plains in what was once Kansas Territory but now is Colorado.

This section of the trail proved to be the most difficult, due to a lack of water, yet the Plains Indians of the day considered this region as prime hunting ground.