The Spring Garden Tunnel is a railway tunnel located at Spring Garden, California. At 7,344 ft (2,238 m) long, it is the longest of 34 tunnels on the Feather River Route (cf. Chilcoot Tunnel) and crosses under the drainage divide between the East Branch North Fork Feather River (north portal, 39°53′15″N 120°47′02″W / 39.8876°N 120.7840°W) and the Middle Fork Feather River (south portal, 39°52′07″N 120°46′30″W / 39.8686°N 120.7750°W).