Greycliff South is a concrete boat ramp located river right near a large irrigation gate at the Greycliff Fishing Access Site on the Madison River.

The ramp is part of a larger campground facility with two designated campsites, toilets, drinking water, and established fire pits; note that floaters must stay river right after passing this ramp to reach the Greycliff North takeout approximately one mile downstream, or face a 15-mile float to the next access at I-90.