The Luodong Forest Railway or Bong Bong Train (traditional Chinese: 羅東森林鐵路; simplified Chinese: 罗东森林铁路; pinyin: Luódōng Sēnlín Tiělù) was a 36.4 km (22.6 miles) long narrow gauge forest railway with a gauge of 2 ft 6 in (762 mm) near Luodong in Yilan County, Taiwan.

Chinese diesel rail cars were introduced in 1971, to improve the quality for the passengers while reducing the operating cost.

The goods volume of forest produce declined after 1976, and passenger transport lost in importance due to increasing road traffic.

[2] In August 2019, Wu Tze-cheng stated that the railway would be rebuilt in two phases, for a total cost of NT$8 million.

A 3.9-km-long piece of track is planned to be used for regular heritage trains starting with effect of October 2017.