R186 road
Bóthar R186
R186 at Tydavnet
Route information
Length	18.5 km (11.5 mi)
Location
Country	Ireland
Primary destinations	County Monaghan leaves the N54 near Monaghan Tydavnet Terminates at the Republic of Ireland–United Kingdom border
Highway system
Roads in Ireland Motorways Primary Secondary Regional

The R186 road is a regional road in Ireland linking Monaghan in County Monaghan and the Republic of Ireland–United Kingdom border. The road passes through the village of Tydavnet.^[1] The road is 18.5 km (11.5 mi) long.