Sonoma TrainTown Railroad, Theme park in Sonoma, United States.

Sonoma TrainTown Railroad is a 10-acre amusement park whose main feature is a 15 in (381 mm) gauge miniature railway, built as a 1:4 scale model of a standard-gauge line. Its four miles of track carry up to 90 passengers on a 20-minute ride past waterfalls, detailed houses, a trestle and several tunnels. The park also holds a carousel, a Ferris wheel, a mine train roller coaster, an airplane ride and a petting zoo.

Stanley L. Frank founded TrainTown in 1958, building two steam locomotives, an electric engine, miniature houses, and landscaped grounds before opening it to the public in 1968. The park grew from one person's passion for creating a detailed model railroad experience.

Stanley L. Frank built the miniature railroad himself, from the locomotives to the houses and landscaping, and his son Robert now runs it with wife Barbara and daughter Monica. The petting zoo keeps goats, chickens, ducks, llamas, sheep and bunnies, several of them rescues. Six vintage rides surround the line, among them the Iron Horse Carousel and a 46-foot Ferris wheel.

Admission and parking are free; visitors pay separately for the train ride and each amusement ride. The miniature railway circuit runs about 20 minutes and carries up to 90 passengers per departure, so plan the ride into your walk around the 10-acre grounds.

The park features a replica of the New York Central Hudson locomotive number 5212 and displays the original steam locomotive 4-6-4 Hudson number 6088 from Goleta Valley Railroad. These two engines show different ways that railroad history is preserved, one through faithful model building and one through an authentic historic machine.