• 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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  • 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 »

  • USFS Access Road and Trail Closures

    The following USFS trails providing backcountry access to the park service complex are closed due to Lone Mountain and Carlton Complex Fires: Twisp Pass, South Creek, Reynolds Creek, War Creek, Summit. The Twisp River Road is closed west of Eagle Creek. 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?

Grizzly bear track in North Cascades National Park (1989). Photo Credit: NPS/NOCA/Roger Christophersen

Grizzly bear tracks can be a reliable indicator of species? Grizzly bear and black bear forepaw tracks are distinct from one another and often times better than a photo of the bear to confirm an observation. So don't just look up, look down.