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About the Layout

RTAC Software


The Randall Museum Model Train Layout

The Randall Museum in San Francisco hosts a large HO-scale model train layout.
The layout was built by the
Golden Gate Model Railroad Club -- in 1961 the Club was offered space in the basement of the Randall Museum in San Francisco, where it has been to this day.

A Presentation of the Randall / GGMRC Layout
Details on the original design and technical parts
A Presentation of the Randall / GGMRC Layout

Blog & News
The latest developments on the layout
Blog & News

The layout is the result of more than fifty years’ effort to create a railroad in miniature with the communities it serves and combined with engineering and geographical features found on railroads in California. It features snowsheds on the high mountain line, various types of bridges spanning canyons on the Mountain Division and a narrow gauge line. The layout is HO scale and is contained in a room measuring 57 feet long by 38 feet wide. The mainline is about 600 feet long (nearly 10 scale miles), with an additional 200 feet or so of sidings and passing tracks (see below for the track plan).

The layout originally operated fully in DC with a state-of-the-art multi-throttle setup and centralized dispatch towers. Shortly after the 2010’s, the layout was converted to operate both in DC and DCC. In 2015 the Randall Museum closed for two years of renovation. At that time, the Club donated the layout to the Museum. Upon reopening in 2018, the layout is fully operating in DCC with some parts of the track being automated.


The Randall Museum is located at 199 Museum Way, San Francisco, California 94114.

The museum is open from 9 AM to 5 PM, Tuesday to Saturday.
Note that it is closed on Sundays and Mondays.
Access is free.

The layout is located in the basement. An elevator is available.

From Tuesday to Friday, the layout works in automated mode. Trains run at regular interval.
On most Saturdays, volunteer operators come and run their own trains, depending on availability.

Layout Maps

Whole Layout Track Maps & Track Plan:

Track plan and label for Stockton Yard:

Schematics & Technical Documentation

Power Routing for the Stockton Passenger Station, SIA & Dow Freight Sidings:

Software Automation

Usage labels for balloon tracks:


Video playlist of various trains filmed in the Randall Museum including cab rides showing the whole layout:


Photo Gallery


Usage manual for Museum Staff and Saturday Operators: Randall Manual - Full v3 - 2018-08-30.pdf

Daily Activations Report: Daily Dashboard

Link to the legacy GGMRC web site (no longer updated).


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