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Related Historical Markers
By Cosmos Mariner, July 30, 2015
Twin Tunnels Bored Through Granite Marker
SHOWN IN SOURCE-SPECIFIED ORDER
1 ► Washington, King County, Skykomish — Twin Tunnels Bored Through Granite — Iron Goat Trail —  |
| 2 ► Washington, King County, Skykomish — A Route Still in Use — Iron Goat Trail — MP 1718.98 — |
| 3 ► Washington, King County, Skykomish — Snowsheds Protected the Railway — Iron Goat Trail — MP 1719.53 — |
| 4 ► Washington, King County, Skykomish — Snowsheds Needed Solid Support — Iron Goat Trail — MP 1719.88 — |