The waterfall is located at the south end of Mill Creek as it plunges into the Rogue River over a carved cliff surrounded by walls of petrified volcanic ash consequence of Mount Mazama eruption.

With a height of 173 feet, Mill Creek Falls is among the tallest waterfalls in Oregon.

Mill Creek Falls is located at the southernmost tip of the Prospect State Scenic Viewpoint.

The United States Geological Survey (USGS) places the falls at coordinates 42°44′25″N 122°29′43″W / 42.7403193°N 122.4952308°W / 42.7403193; -122.4952308 at an elevation of 2,365 feet (721 m) above sea level.

[4] The trail-head has an illustrative map of the area including the trail to the Avenue of Boulders and Mill Creek Falls.