6 votes

SP - Summit Tunnels 6, 7, and 8


West Portal

BH Photo #162893


Street View 


Abandoned tunnels on former Central Pacific (later SP) Railroad
Placer County, California, and Nevada County, California
Built by the Central Pacific Railway as part of the original transcontinental railway to finally cross the Sierra's at Donner Pass; Track 1 abandoned in 1996
- Lewis M. Clement
- Central Pacific Railway (CPRR)
- Southern Pacific Railroad (SP)
Total length: 10,322.0 ft. (2.0 mi.)
Approximate latitude, longitude
+39.31661, -120.32959   (decimal degrees)
39°18'60" N, 120°19'47" W   (degrees°minutes'seconds")
Approximate UTM coordinates
10/730218/4355312 (zone/easting/northing)
Quadrangle map:
Inventory number
BH 44931 (Bridgehunter.com ID)

Update Log 

  • May 30, 2013: New Street View added by Craig Philpott
  • November 22, 2011: Updated by Craig Philpott: refined location
  • August 11, 2010: New photos from Craig Philpott
  • April 19, 2010: Updated by Nathan Morton: Tracks ripped out by the UP in 1996


  • Nathan Morton - morton890 [at] yahoo [dot] com
  • Craig Philpott - craigphilpott63 [at] gmail [dot] com


SP - Summit Tunnels 6, 7, and 8
Posted June 3, 2021, by Roger Deschner (rogerdeschner [at] gmail [dot] com)

Summit Tunnels 6 & 7 have been named to "America's 11 Most Endangered Historic Places for 2021" by the National Trust for Historic Preservation.


SP - Summit Tunnel
Posted September 8, 2017, by David (volcrano [at] gmail [dot] com)

I think this is mislabled. The 2-mile long Summit Tunnel is the one still in use. The one that is abandoned is tunnel #6 which is 1659 feet. Tunnels 7 and 8 were also abandoned.


Summit Tunnel
Posted December 1, 2012, by Ed Hollowell (erhollowell [at] aol [dot] com)

That's progress for ya!

Summit Tunnel
Posted November 27, 2012, by Tim Maness (tmadness91 [at] gmail [dot] com)

I visited this tunnel over Thanksgiving Weekend 2012, and the tunnel is now blocked to all traffic and pedestrians. A newly built gate now sits locked just west of the west portal and bridge over the opening, with plenty of "No Trespassing" signs.

Summit Tunnel
Posted August 11, 2010, by Craig Philpott (cphilpott [at] puc [dot] edu)

This now abandoned segment of the original rail line over Donner Summit has at least four tunnel and/or avalanche shed segments spread across more then 10,000 feet of rail bed. This segment has been replace with one, straight, two mile tunnel under the mountain pass. In 2008 the old tunnel was open to be driven through by high clearance vehicles.