Maine State Route 186

State Route 186
Route information
Maintained by MaineDOT
Length16.00 mi (25.75 km)
Existed1925–present
Major junctions
West end US 1 in Gouldsboro
Major intersections SR 195 in Gouldsboro
East end US 1 in Gouldsboro
Location
CountryUnited States
StateMaine
CountiesHancock
Highway system
SR 185 SR 187

State Route 186 (SR 186) is a sixteen-mile-long (26 km) state highway in south central Maine. The highway serves the town of Gouldsboro, running in a half-loop from U.S. Route 1 (US 1), south and east along the southern coast to Winter Harbor near Frenchman Bay, and then returning to US 1.