The Blue River is a 24-mile-long stream that runs through the Apache-Sitgreaves National Forest in Arizona. It arises near Alpine and flows south into the San Francisco River just upstream from Clifton. The Blue River varies in altitude from 6400 to 4000 feet. Although only a good snow melt and the accompanying runoff provide the Blue River with its water flow, anglers may find some trout in the upper reaches. Campers may set up at two established sites (Upper Blue or Blue Crossing) or at the primitive grounds at the end of FR 281.