The R357 road is a regional road in Ireland linking Athleague, County Roscommon and Blue Ball, County Offaly. It passes Ballinasloe, County Galway, crosses the River Shannon at Shannonbridge, passes through Cloghan, County Offaly and then through the cutaway peatlands of Boora Bog to Blue Ball where it terminates at the N52.
The road is 76 km (47 mi) long.