• 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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  • State Route 20 closed at Mile Post 134, Ross Dam

    After a brief closure at Newhalem due to an avalanche and unstable conditions, SR 20 has re-opened to its normal winter closure point at MP 134, Ross Dam. The highway will remain closed from Ross Dam to MP 171 (Silver Star Creek) until spring re-opening. More »

  • Ross Dam Haul Road Closure Continues

    A short segment of the Ross Dam Haul Road between the Diablo Lake suspension bridge and the tunnel remains closed to public use due to continued recovery following a March 2010 landslide. The closure will remain in effect through 2014. More »

  • Notice of planned work for the Cascade River Road, fall 2014

    Visitors planning to access the park via the Cascade River Road after Labor Day should be advised that the Park Service is planning a fall closure of this road at Eldorado Creek (3 miles before the end of the road) in order to perform permanent repairs. More »

Bald Eagle Surveys

Bald Eagle Surveys Document Long Term Trends

Bald eagle surveys conducted over the last two decades may show an increase in the number of bald eagles wintering along the Skagit River between Rockport and Newhalem. The Skagit Valley hosts one of the largest concentrations of this threatened bird of prey in the lower 48 states. The arrival of the eagles coincides with the spawning of salmon, whose carcasses are the birds major food source. Variations in chum salmon runs and weather patterns account for some fluctuations in census numbers. Resource managers are concerned that increasing recreational activities could seriously impact eagles. Baseline and long-term studies are necessary to detect long-term changes in eagle numbers.

Only a small proportion of the bald eagles wintering on the Skagit River feed between Marblemount and Newhalem. National Park Service biological surveys showed an interesting trend in that area during the first 10 years of the study. During the early 1980's little variability existed, with total sightings ranging from 125 to 139. However, beginning in the 1987-88 winter, total sightings ranged from 221 to 319. The percent of subadults also increased. Larger numbers of immature eagles are an indication of better breeding success up north, where they spend their summers, and may partially account for an increase in the abundance of bald eagles concentrated along the Skagit River each winter.

A complementary study began in 1984 with volunteers coordinated by the Forest Service documenting bald eagle nightroost activity. Data provided by these studies may support protection of eagle habitat in the Skagit Valley. They also will lead to habitat improvement projects for salmon and eagles, thus enhancing their survival. Signs were placed to help visitors learn about the eagle's life cycle, habits and special needs.

These surveys are fine examples of interagency cooperation between the USDA Forest Service, National Park Service, North Cascades Institute, Skagit Audubon, Wildcat Steelhead Club, Nature Conservancy (Skagit River Bald Eagle Natural Area) and many concerned volunteers.

Check out the Bald Eagle Counts. Skagit Bald Eagle Counts are compiled from the three simultaneous surveys that are done on Wednesdays from early December through February by National Park Service, Forest Service and the Nature Conservancy.

Did You Know?

lupine is a common flower in dry sunny areas

In addition to Wilderness, Recreation Areas and National Park designations there are also five Research Natural Areas in the complex: Silver Lake, Pyramid Lake, Boston Glacier, Stetattle Creek and Big Beaver Valley.