Yosemite Mountain Sugar Pine Railroad

View of the railroad's track as it winds south into thick forest cover.

The current railroad follows a portion of grade originally carved into the mountain by the Madera Sugar Pine Lumber Company in the early 20th century. The company originated in 1874, when it was organized as the California Lumber Company to log the area surrounding Oakhurst, California.[3] The Madera Sugar Pine Lumber Company once had a large sawmill at Sugar Pine, California, just south of the current YMSPRR.[4] The railroad had seven locomotives, over 100 log cars, and 140 miles (230 km) of track in the surrounding mountains.[5] In addition to the railroad, the Company also transported lumber in a flume that stretched 54 miles (87 km) from Sugar Pine to Madera, California.[6] This was the most efficient way to transport rough cut lumber out of the mountains for finishing and transport at the bottom of the mountain. The Madera Sugar Pine Lumber Company practiced clearcutting, which removed almost every single tree within the stands of timber surrounding the YMSPRR track. The thick forest surrounding YMSPRR today belies this history, although large stumps from the original old growth timber dot the forest floor lining the tracks.

A Madera Sugar Pine Lumber Co. log train climbing a steep grade near Sugar Pine, California, circa 1915.

Due to the onset of the Great Depression and a lack of trees, the operation closed in 1931. But the graded right-of-way through the forest remained, enabling the Stauffer family to reconstruct a portion of the line in 1961. The current railroad utilizes locomotives, converted log disconnect cars, and other railroad equipment purchased from the West Side Lumber Company after it ceased railroad operations in 1961.[7]

Max Stauffer died on March 10, 2017.[8] In late August 2017, the Railroad Fire, which started near the railroad, destroyed West Side Lumber Company equipment stored on a side track.[9]

• No. 10: a 3 ft (914 mm) narrow gauge three-truck Shay steam locomotive constructed for the Pickering Lumber Company.[10] The locomotive was completed on March 2, 1928, by the Lima Locomotive Works of Lima, Ohio, and later acquired by the West Side Lumber Company in 1934. No. 10 burns oil, with a capacity to hold 1,200 U.S. gallons (1,000 imperial gallons; 4,500 liters) of oil and 3,420 US gal (2,850 imp gal; 12,900 L) of water. This locomotive is reputedly the largest narrow gauge Shay locomotive ever constructed.[11]
• No. 15: also a 3 ft (914 mm) narrow gauge three-truck Shay steam locomotive. No. 15 was originally constructed as the No. 9 for Norman P. Livermore & Company, out of San Francisco, California, and soon thereafter sold to the Sierra Nevada Wood & Lumber Co. The locomotive was completed on May 20, 1913, by the Lima Locomotive Works of Lima, Ohio. No. 15 burns oil, with a capacity to hold 1,000 US gal (830 imp gal; 3,800 L) of oil and 2,000 US gal (1,700 imp gal; 7,600 L) of water. In 1917, the No. 15 was acquired by Hobart Estate Co. as their No. 9. In 1938, the No. 15 was given its current number when purchased by the Hyman-Michaels Co., operating out of San Francisco. The West Side Lumber Company purchased No. 15 only a year later. When the West Side shut down in the 1960s, a tourist operation, the West Side & Cherry Valley, acquired the No. 15. After hauling tourists for a number of years, the locomotive sat on static display in Tuolumne, California, until the YMSPRR acquired it in 1988.[12]
• "Jenny" Railcars: Ford Model A automobiles converted for rail use by the West Side Lumber Company. These railcars each accommodate about 12 people, providing regular service in conjunction with the normal steam operation.[13]
• No. 402: a 3 ft (914 mm) narrow gauge center cab two-truck diesel locomotive. The YMSPRR does not use this locomotive for regularly scheduled revenue service.
• No. 5: a 3 ft (914 mm) narrow gauge two axle diesel switch engine built in 1935, but not currently in operating condition.[14]

• 
  No. 10 taking on water at the midway point of a crisp morning run.
• 
  No. 15 leaving the engine house.
• 
  No. 402 prepares for a tourist excursion in 2022.
• 
  No. 5 is a two-axle diesel switch engine with a narrow gauge of 3 ft (914 mm).
• 
  A Jenny Railcar.

• The Thornberry Museum, a historic log cabin built over 140-years ago, offering visitors a glance at what life was like on the slopes of the Sierras over a century ago
• The Sugar Pine Trading Company, providing a selection of literature and sources related to the YMSPRR, railroads and the history of Yosemite Valley
• Picnic and event grounds at the eastern terminus of the line
• Gold panning
• A rare narrow gauge snowplow, the West Side Lumber Company's plow No. 2

• List of heritage railroads in the United States
• Yosemite National Park

• Yosemite Mountain Sugar Pine Railroad Website
• Picture album of the railroad
• The Narrow Gauge Inn, adjacent to the railroad property
• 30-min video: Huell Howser rides the railroad on a 2007 episode of California's Gold.