San Francisco and North Pacific Railroad (SF&NP) provided the first extensive standard gauge rail service to Sonoma County and became the southern end of the regional Northwestern Pacific Railroad. Sonoma County's first standard-gauge railroad was the 1-mile (1.6-km) Petaluma and Haystack Railroad connecting the city of Petaluma with ferry service to San Francisco from Haystack Landing on the Petaluma River in 1864. Petaluma and Haystack coaches were pulled by horses after the locomotive exploded on 27 August 1866.