The Hillside Experience

Hillside Trailers and Caps is your one-stop trailer and truck source. We have well over 50 different trailer models in stock and ready for immediate delivery.  We service, repair and can custom outfit your trailer for your own personal needs. We can also special order a wide variety of personalized and customized dump, enclosed and utility trailers.

Hillside Trailers and Caps also has a full line of products for your truck.  We sell A.R.E truck caps along with many truck and SUV accessories. We install bug shields, vent visors, mud guards, running boards, bed rugs, bed liners and bed slides and much more. We also have dependable relationships with many local car dealers. Our service department installs Drawtite hitches on cars, vans, trucks and SUV’s and can also wire your vehicle for many different plug applications.

Come in and experience our family atmosphere along with our award winning customer service. We have been in the trailer and cap industry for over twenty years.  Hillside Trailers and Caps is proud to serve Frederick and surrounding areas such as Hagerstown, Taneytown, Gettysburg, Mount Airy, Silver Spring and Rockville. Our store is located less than an hour from the Baltimore and DC area. We would like to thank you for visiting our website and look forward to serving you in the near future. Hillside Trailers and Caps would also like to thank our current customers for their on-going support and word-of-mouth advertising. Your continued loyalty is greatly appreciated.

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Hillside Trailers & Caps, Inc.

46-A Thomas Johnson Drive

Frederick, MD 21702


Mon - Fri: 8am - 5pm

Sat: 8am - 12pm


Summer Hours

March 1st - November 1st

Saturday: 8am - Noon

Hillside Trailers & Caps proudly carries trailers, truck caps, and truck parts / accessories from the following manufacturers:


Hillside Trailers and Caps had the honor of being selected by A.R.E. and Under Armour for the installation duties on the Wounded Warrior Project truck.

Our service department was proud to handle the wiring duties along with the install of the A.R.E. MX series cap on the Wounded Warrior Project truck.

It has been an honor and privilege to be apart of this project from start to finish.  Hillside Trailers and Caps would like to thank Under Armour and The Wounded Warrior Project.

Hillside Trailers and Caps supports our troops and our Veterans.  Being a part of this project is a way for our family owned business to give something back to our troops.