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Hidden Underground Tunnels Of Sacramento

Published:

Modified: 5 October 2026

by Karyn Tye

Hidden Underground Tunnels Of Sacramento

Sacramento's hidden underground spaces are remnants of the city's original street level, left when the city raised its streets in the 1860s to reduce flooding. These hollow sidewalks and enclosed spaces were not built as tunnels but are the byproduct of that massive engineering project.

1. Old Sacramento Underground

Old Sacramento is a historic district with a network of underground spaces left behind in the 1860s when the city raised its streets above floodwaters.

  • Hollow Sidewalks: Enclosed spaces that once served as the original street level.
  • Hidden Spaces: Areas that were enclosed when the streets were raised.
  • Enclosed Corridors: Narrow spaces left from the original street level.

2. The Tunnels of Sutter's Fort

Sutter's Fort, a historic park, has no documented underground tunnels from the 1860s street raising. The sourced facts only document underground spaces in Old Sacramento resulting from that project, and no reputable source supports escape tunnels, storage chambers, or hidden meeting rooms at Sutter's Fort.

3. The Capitol Building's Underground Network

The California State Capitol Building has an extensive underground network, but no reputable source supports service tunnels, secure passageways, or historical archives in tunnels at the Capitol Building.

4. The Tunnels of the Sacramento River

Claims about tunnels beneath the Sacramento River for smuggling, transportation, or flood control are not supported by authoritative material and should be treated as folklore.

5. The Underground of the Delta King

The Delta King, a historic riverboat, has no documented underground tunnels from the 1860s street raising, and no reputable source supports maintenance tunnels, secret rooms, or escape tunnels on the Delta King.

6. The Tunnels of the Sacramento City Cemetery

The Sacramento City Cemetery, one of the oldest in the city, has no documented underground tunnels from the 1860s street raising, and no reputable source supports burial chambers, secret passageways, or historical vaults in tunnels at the cemetery.

7. The Underground of the Eagle Theatre

The Eagle Theatre, a historic venue, has no documented underground tunnels from the 1860s street raising, and no reputable source supports storage rooms, secret meeting rooms, or escape tunnels at the Eagle Theatre.

Discovering Sacramento's Hidden History

Sacramento's underground spaces offer a glimpse into the city's past. These hollow sidewalks and enclosed spaces, once the original street level, are a reminder of the challenges and resilience of early settlers. Whether you're a history buff or just curious, these spaces provide an experience. Next time you're in Sacramento, take a tour and step back in time. You'll leave with stories to share and a respect for the city's hidden depths. Sacramento's underground spaces are more than just a tourist attraction; they're a journey into the heart of California's history.