Between Tateyama in Toyama and Ōmachi in Nagano.
15–20m
snow walls of Yuki-no-Ōtani, mid-April to June
2,450m
Murodō, the highest point on the route
37km
the whole route, opened 1 June 1971
1,975m
difference in elevation along it
186m
Kurobe Dam, the tallest in Japan
Numbers: Wikipedia, "Tateyama Kurobe Alpine Route" and "Murodō".