From Fukuchiyama Station to Oe Station, the line runs along the Yura-gawa River, and from Oe Station to Miyazu Station, it crosses the mountains through a series of tunnels, including the 3,215-meter Fuko Tunnel.
福知山～大江間は由良川に沿って進み、大江～宮津間は全長3,215mの普甲トンネルを始めとするトンネルの連続で山を越える。