Big 10 Curve Train Webcam in Arvada, Colorado
Big 10 Curve Train Webcam in Arvada, Colorado – Live Railroad & Scenic View
The Big 10 Curve train webcam in Arvada, Colorado, hosted by Virtual Railfan, provides a live PTZ (pan-tilt-zoom) view of one of Colorado’s most iconic railroad locations. Overlooking the famous Big 10 Curve near Milepost 21 on the Union Pacific Moffat Tunnel Subdivision, this camera captures trains navigating a dramatic S-shaped curve as they transition from the Great Plains into the Front Range of the Rocky Mountains.
This webcam offers an exceptional viewing experience, allowing viewers to watch trains approach for extended periods — often over 20 minutes — as they wind through the curve. The elevated perspective also provides sweeping views of the valley below and even the distant Denver skyline, making it as scenic as it is functional.
Rail traffic at Big 10 Curve is active and varied. Viewers can see trains from Union Pacific Railroad, BNSF Railway (via trackage rights), and Amtrak, including the famous California Zephyr. The Rocky Mountaineer also operates through this area several times per week. With an average of around 12 trains per day, and sometimes more, there is frequent activity to enjoy.
Whether you are a railfan, a history enthusiast, or simply looking for a scenic live view, this webcam provides a unique window into both railroad operations and Colorado’s landscape.
About Big 10 Curve and Railroad History
The Big 10 Curve is a historic and engineering marvel located near Arvada, Colorado. Originally constructed in 1902 by the Denver, Northwestern & Pacific Railway, the route was designed to overcome a challenging elevation gain as trains climbed from the plains into the mountains.
The line later became part of the Denver & Salt Lake Railroad, and was eventually acquired by the Denver & Rio Grande Western Railroad, with the merger finalized in 1947. Today, it is operated by Union Pacific as part of the Moffat Tunnel Subdivision.
The name “Big 10 Curve” comes from its distinctive design, which includes two sections known as the “Big Ten Loop” and the “Little Ten Loop.” Each features tight 10-degree curves that allow trains to safely navigate the terrain. The route was engineered to manage a 600-foot elevation gain over 2.85 miles by extending the track to 7 miles, reducing the grade from a steep 4% to a more manageable 2%.
This innovative design remains a standout example of railroad engineering, and the curve continues to be a key part of rail traffic through Colorado. The webcam provides a rare opportunity to watch trains navigate this historic section of track in real time.
Why Use This Webcam
• Watch trains navigate the historic Big 10 Curve in real time
• View Union Pacific, BNSF, Amtrak, and Rocky Mountaineer trains
• Enjoy extended train approaches with long viewing times
• See scenic views of the Front Range and Denver skyline
• Experience one of Colorado’s most famous railroad locations
FAQ
Where is this webcam located?
This webcam is located near Arvada, Colorado, overlooking the Big 10 Curve on the Union Pacific Moffat Tunnel Subdivision.
What trains can I see on this webcam?
You can see Union Pacific freight trains, BNSF trains (with trackage rights), Amtrak’s California Zephyr, and the Rocky Mountaineer.
Why is the Big 10 Curve important?
It is a historic engineering feature designed to reduce steep grades, allowing trains to safely climb into the mountains.
Is the webcam live?
Yes, this is a live PTZ camera that continuously streams and may move to follow trains.
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