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

    North Cascades

    National Park Washington

There are park alerts in effect.
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  • Diablo Lake To Be Drawn Down Three Feet on Sept. 17 and Early Oct., Trailer-Launched Boats Affected

    On September 17 and October 1-15 Diablo Lake will be drawn down 3 vertical feet for facility repairs. 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 »

Trees and Shrubs

Conifers – the Cone Bearers – dominate the forests of the North Cascades. They span the elevation ranges from sea level to the alpine zone, sheltering the low valleys and clinging to the thin mineral soils of the high peaks.

The conifers are often referred to as evergreens because of their characteristic needle or scale-like leaves that persist throughout the year. Yet, two species of larch are deciduous – dropping their needle leaves in the fall after turning a beautiful soft shade of gold.

In the North Cascades conifers define the major forest types, but adding to their complexity are many species of deciduous broad-leaved trees. Species of maple, poplar, and alder grow in the natural openings caused by disturbances to the upper canopy. This happens when large trees are blown over by wind or die of disease. Broad-leaved trees also grow along the edges of streams and rivers where there is more available light.

Woody shrubs, both coniferous and deciduous, grow in the understory of these forests providing shelter and food for wildlife. Many birds such as the rufous hummingbird also use shrubs for nesting. Shrubs are also important along stream corridors where their shade helps to keep water temperatures from getting too high for fish, particularly salmon, and other aquatic fauna.

What is the difference between a shrub and a tree?

Generally, trees are over 20 feet tall and have trunks more than 2 inches in diameter at 4.5 feet about the ground. Shrubs are smaller than trees and often have many small, woody, bark covered stems rising from the base.

 

Additional Resources:
Tree Checklist
(PDF 82 kb)

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.