HO scale model trains are the most popular scale among model railroaders. HO model trains got their HO designation because they are half the size of O scale. HO refers to "half zero" and was simply shortened to HO.

HO model trains are the most popular for a number of reasons. Their size allows model enthusiasts to build large and elaborate layouts in smaller areas than larger scale trains would allow. Curved track for Ho trains is available with a radius as small as 15 inches, thus allowing for extremely tight curves, another space saving measure. HO model trains and accessories are available from a large array of manufacturers, giving modelers a huge selection to choose from. Models are available across a wide variety of price ranges, making HO scale trains affordable for all budgets.

Train layouts have unlimited design capabilities. A train layout can represent any terrain or geographical location desired. From a train running across a midwestern prairie to a mountain railroad, any design imaginable can be created. Many modelers design and create trains that are specific to a certain era or replicate their favorite railroad. Anything is possible with the variety of trains and accessories available today.

HO model trains provide an extreme degree of realism, both through the detailed locomotives, a large variety of realistic cars, tankers, and life-like layouts. Modern technology has brought advances in areas such as Digital Command Control, digital sound, and lighting. The HO trains of today are truly miniature railroads brought into your home.

Shopping for model trains has also become easier and more convenient. Hobby shops carry a broad selection of model trains, and the internet provides endless possibilities. Online stores and auctions offer a broad spectrum of choices. Enthusiasts can find the latest models as well as antique and collectible trains and accessories.

Model railroading is an enjoyable and rewarding hobby. Many people enjoy it throughout their lives. HO scale trains are a passion with many modelers, and a great way to get started in a hobby that may well last a lifetime.