Stillman Creek originates near Kings, Illinois and continues its course through Ogle County until it reaches the Rock River at its mouth.

[4] The land surrounding the Rock River and its tributaries is home to a wide variety of plant and animal species.

[6][7] The use of the word "run" was a double entendre describing both the creek and Stillman's "tactics" during the battle.

[2] In modern times, the village of Stillman Valley has been authorized to discharge treated wastewater into the creek.

[citation needed] Stillman Creek's elevation is 679 feet (207.0 m) above sea level and it is part of the Rock River watershed.