From source to mouth, the river flows through Apache, Greenlee, Graham, Navajo and Gila counties.[1] It forms a boundary between Apache and Greenlee counties, then between Apache and Graham counties, and further downstream, between Graham and Navajo counties.[7]
Some of the places along the lower river are difficult to reach. Many of the roads in the area are unpaved and unmarked on major maps. The "Black River AZ Map" and "Lower Black River guide book" show more details. Bear encounters are possible along this river. Indian route 9 crosses the river at Black River Crossing.[9]
The East Fork Black River and West Fork Black River, which merge to form the mainstem, have populations of brown trout and Apache trout.[11] The headwaters tributaries support many aquatic insects, including more than 30 species of caddisflies. Some of the state's best sports fisheries are found in the Black River watershed.[12] Special permits are required to fish on either reservation.
^"Chapter 8 Salt River Watershed"(PDF), Biological Assessment of the Arizona Game and Fish Department's Statewide and Urban Fisheries Stocking Program for the years 2011—2021, U.S. Fish and Wildlife Service Arizona Game and Fish Department, 2011
Benke, Arthur C., ed., and Cushing, Colbert E., ed.; Blinn, Dean W. and Poff, N. Leroy (2005). "Chapter 11: Colorado River Basin" in Rivers of North America. Burlington, Massachusetts: Elsevier Academic Press. ISBN0-12-088253-1. OCLC59003378.