Located in the headwaters of Blue Knob Branch, Blue Knob Falls is a steeply-sliding wet-weather waterfall about 40 feet high. It lies in the upper Chattahoochee River watershed and can be accessed via a tough off-trail bushwhack upstream from Chattahoochee River Road.

To learn about more waterfalls in the Helen area, see chapter 6 in Mark Ozboyd's "Waterfalls of Georgia" guidebook.