Black Rock Turnpike

Route 58
Map of Fairfield County in southwestern Connecticut with Route 58 highlighted in red
Route information
Maintained by ConnDOT
Length:	18.58 mi (29.90 km)
Existed:	1932 – present
Major junctions
South end:	US 1 in Fairfield
	Route 15 / Merritt Parkway in Fairfield
North end:	Route 302 in Bethel
Location
Counties:	Fairfield
Highway system
Routes in Connecticut Interstate U.S. State SSR SR ← Route 57 Route 59 →

Route 58 is a primary state highway in the U.S. state of Connecticut connecting the towns of Fairfield and Bethel. Route 58 is 18.58 miles (29.90 km) long and is one of the primary routes to the downtown Danbury area via Routes 302 and 53.

Route 58 officially begins at U.S. Route 1 in Fairfield, traveling for about 1.0-mile (1.6 km) on Tunxis Hill Road up to the Black Rock Turnpike. Route 58 continues northward along the Black Rock Turnpike, passing through the towns of Easton and Redding. There is an interchange with the Merritt Parkway in Fairfield. Within Easton, Route 58 can also go by the name "Black Rock Road" as well as "Black Rock Turnpike." Route 58 passes by two reservoirs (Hemlock Reservoir and Aspetuck Reservoir) that supply the Greater Bridgeport area with much of its drinking water. On crossing into the town of Bethel, Route 58 runs along "Putnam Park Road", ending at Route 302.

Black Rock Turnpike continues south after Route 58 separates from it in Fairfield. It ends at a junction between U.S. Route 1 and Interstate 95. This portion is designated as State Road 732 and is 1.05 miles (1.69 km) long.