• View from Sourdough Mountain Overlook  A view looking down onto Diablo Lake. Photo Credit: NPS/Michael Silverman, 2010.

    North Cascades

    National Park Washington

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  • Diablo Lake To Be Drawn Down Three Feet in Early Oct., Trailer-Launched Boats Affected

    Diablo Lake will be drawn down 3 vertical feet for facility repairs from October 1-15. During the drawdown, boats with trailers will not be able to launch or take boats off the water. Hand-launched vessels will still be able to launch. More »

  • Cascade River Road will be open as normal through fall/winter 2014

    Cascade River Rd. will be open in 2014 until snow conditions make it impassable to vehicles, as normal. The road closure that was planned to begin September 8 has been postponed beyond 2014 due to unforeseen circumstances. More »

  • Lone Mountain Fire - National Park Service Trail Closures

    The Lone Mountain Fire in North Cascades National Park is approximately 5 mi NW of Stehekin in the Boulder Creek drainage. Boulder Creek Trail is closed. More »

Acoustic Monitoring Site: Sourdough Mountain

Sourdough Trail enshrouded in fog. Image Credit: NPS/NOCA/Basil Tsimoyianis
Sourdough Trail enshrouded in fog.
NPS/NOCA/Basil Tsimoyianis
 

July 2010
High above the highway, a grueling hike rewards visitors with breathtaking views of the highway corridor and the surrounding peaks. The site was located about a mile below the lookout tower, yet sounds of the highway were still audible. A thunderstorm roared through this site and echoed off the peaks and valleys.

Click each title to hear a sound recording. Click on "Sound Clips" in the navigation to return to the map.

 
 
 
 
 

Did You Know?

North Cascades is now on Flickr!

North Cascades National Park is uploading its digital image library to Flickr! Be inspired, download your favorite images, or even add your own vacation photographs to the group pool: Friends of the North Cascades. More...