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Jefferson County

Keystone tunnel under the road

Highlight • Bridge

Keystone tunnel under the road

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Lewis & Clark Caverns State Park

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    runners

    1. Keystone tunnel under the road loop from Whitehall

    12.5km

    01:29

    460m

    460m

    Hard run. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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    Hard

    Tips

    December 20, 2024

    Built in the 1930’s, the bridge was specifically built using this ancient technique in order to preserve the old way of building.

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      Elevation 1,490 m

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      Tuesday 25 November

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      Location: Jefferson County, Montana, United States

      Other Popular Places to Check Out

      Confluence of the Jefferson, Madison, and Gallatin Rivers

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