Rising from a pond in Bolton, the Blackledge amasses waters from feeder creeks along its course before joining the Jeremy River in Colchester, Connecticut. Salmon River, considered a major tributary of the Connecticut River, begins at the confluence of the Blackledge and Jeremy. 
A popular whitewater paddling route begins at West Road about 4 miles (6 km) south of Gay City State Park. There are frequent Class I-II whitewater rapids throughout the route to the Salmon River.
- U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National Map Archived 2012-04-05 at WebCite, accessed April 1, 2011
- Salmon River Watershed Rapid Bioassessment Summary Report 2008. Rep. Salmon River Watershed Partnership & Connecticut Department of Environmental Protection, 2009. Web. 11 Oct. 2016. < http://www.salmonriverct.org/SRW-RBV-2008/Salmon%20RBV%20report%2008%20final%20_print.pdf>.
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