| State Route 186 | ||||
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| Route information | ||||
| Maintained by MaineDOT | ||||
| Length: | 16.13 mi (25.96 km) | |||
| Existed: | 1925 – present | |||
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| Location | ||||
| Counties: | Hancock | |||
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State Route 186 is a 16.13-mile (25.96 km) state highway in south central Maine. The highway serves the town of Gouldsboro, running in a half-loop from U.S. Route 1, south and east along the southern coast near Frenchman Bay, and then returning to US 1.