Tunnel No. 6
From Underfoot
Tunnel Number 6, or the Summit Tunnel, is a railway tunnel between Santa Margarita, California and San Luis Obispo, California. It is the longest tunnel along the Union Pacific Railroad Coast Line at 3,610 feet (1.10 km) in length and is wide enough to carry a single track. The tunnel under the Cuesta Pass represents the highest point along the line at 1,323 feet (403 m) above sea level.
| Type | Subtype | Date | Description | Notes | Source |
|---|---|---|---|---|---|
| site | tunnel | Tunnel No. 6 | railway tunnel | Wikidata | |
