The Blackwater's sandy bottom, white beaches and large sandbars contrast with the dark tannic water that gives the river its name. "Blackwater" is a translation of the Choctaw word oka-lusa, which means "water black".
31 miles (50 km) of the river are navigable by canoe, kayak or small boats. This section of the river, from Kennedy Bridge near Munson, Florida to Deaton Bridge in the Blackwater River State Park, is designated a Florida Canoe Trail – part of a statewide system of greenways and trails.
The river's average flow rate is 2 to 3 miles per hour (3.2 to 4.8 km/h), with an average depth of 2.5 feet (0.76 m). Depending on rainfall, water levels can fluctuate rapidly and low-lying areas are seasonally flooded by the river. This floodplain supports a wide variety of flora and fauna.
The river has spawned many oxbow lakes, some of which can be seen from the river.
Two hurricanes in 1995, Erin and Opal, changed the course of the river downstream from Deaton Bridge in Blackwater River State Park. The section of the river between Deaton Bridge and Milton, Florida is no longer navigable by boat.
The navigable section of the river begins at Kennedy Bridge on State Forestry Road 24 (Kennedy Bridge Road) east of Munson, Florida. The next access point is 6 miles downstream at Peaden Bridge on State Forestry Road 50 (Peaden Bridge Road). Five more miles downstream, between Munson and Baker, Florida, is Cotton Bridge on State Road 4. Twelve more miles downstream is Bryant Bridge, on State Forestry Road 21 (Bryant Bridge Road) near Holt, Florida. The final access point, and the end of the Florida Canoe Trail, is eight more miles downstream at Deaton Bridge on State Forestry Road 23 in Blackwater River State Park.
^U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National MapArchived 2012-03-29 at the Wayback Machine, accessed April 15, 2011
Marth, Del and Marty Marth, eds. The Rivers of Florida. Sarasota, Florida: Pineapple Press, Inc. ISBN0-910923-70-1. P. 95.
Florida Park Service & Department of Environmental Protection brochure Blackwater River State Park, 7720 Deaton Bridge Road, Holt, Florida 32564. (850) 983-5363.