The Chesapeake Beach Railway (CBR), now defunct, was an American railroad of southern Maryland and Washington, DC built in the 19th century. The CBR ran 27.629 miles from Washington, D.C. on tracks formerly owned by the Southern Maryland Railroad and then on its own single track through Maryland farm country to a resort at Chesapeake Beach. It was built by Otto Mears, a Colorado railroad builder, who planned a shoreline resort with railroad service from Washington and Baltimore. It served Washington and Chesapeake Beach for almost 35 years, but the Great Depression and the rise of the automobile marked the end of the CBR. The last train left the station on April 15, 1935. Parts of the right-of-way are now used for roads and a future rail trail.