Denali National Park Bridge Construction Has Finished
A new bridge across the Pretty Rocks Landslide site has officially opened in Alaska.
Updated on Sept. 23, 2026 in National Parks
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The National Park Service has completed a $230 million bridge project in Denali National Park to replace a section of road destroyed by a massive landslide. The new infrastructure restores a critical passage near mile 45 that was closed to traffic in 2021.
Why it matters
The new bridge restores access to the western end of the park road, which had been severed for years following significant geological instability. This reconnection is vital for restoring standard transit and tourism flow through the popular Alaska destination.
The new bridge spans 475 feet in length and stands 50 feet tall with a width of 24 feet. Engineers installed 23 thermosiphons to stabilize the underlying permafrost near the landslide zone.
The players
National Park Service
This federal agency is responsible for managing and maintaining national parks across the United States.
Denali National Park
This major Alaska preserve encompasses millions of acres and is centered around the tallest peak in North America.
The details
Spanning the landslide area near mile 45, the structure bypasses the terrain that forced the road's closure in August 2021. The project incorporates specialized cooling systems to ensure the eastern end of the bridge remains stable despite thawing ground conditions.
Timeline
August 2021: Pretty Rocks Landslide closed the road.
2026 visitor season: Bus access was limited to East Fork.
September 23, 2026: Bridge completed and opened.
2027: Full road access for buses is expected to resume.
Travel Outlook
This project represents a significant departure from typical seasonal maintenance, addressing long-term geological instability at Polychrome Pass. It reflects a growing need for climate-resilient infrastructure in Arctic regions where permafrost degradation threatens established travel corridors.
Visitors should note that while the bridge is now open, full transit service remains limited until the 2027 season. Travelers should check park status updates before planning trips to the western end of the road.
The takeaway
Maintaining reliable access in northern landscapes requires sophisticated engineering to combat shifting ground and permafrost. Travelers can expect ongoing infrastructure investments as parks adapt to the geological realities of the Arctic.
What happens next
Full bus service is scheduled to resume throughout the park road network in 2027.
Further reading
For more information on park accessibility and routes, visit the National Parks section.
Source note: This article includes information reported by Whsv.
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