Hello Nagi and Taghrid -
A Birder's Guide to Washington 2nd Edition discusses birding along the
North Cascades Highway and the national park. The guide is now online
and freely available for all to consult. You can read about birding
along the North Cascades Highway at:
https://wabirdguide.org/north-cascades-highway/
If you notice that anything has changed since the guide was published
(2015), please enter a comment at the website so that others will know
about it.
Good luck with your birding.
Jane Hadley
Seattle, Washington
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