Question: What  is one of the five ranger districts of the Chattahoochee National Forest that has a mountain located in the Chattahoochee National Forest on the border of Fannin and Gilmer counties in the district, along with a portion of the Toccoa River? 
Sentence (from "Apache-Sitgreaves National Forest"): With its high elevation and cool summer breezes it is a popular weekend destination from the hot desert for Phoenix, Arizona residents.
Relevant evidence: No