Landscapes & nature
North Cascades National Park
U.S. National Park located in the state of Washington
Wikipedia names North Cascades National Park as where 1 film or series was filmed; its page links to the sentence that says so. Wikidata records no shoot here yet.

Filmed here, per Wikipedia
Wikipedia says these were filmed in North Cascades National Park. Each title’s page links to the sentence that says so.
The Deer HunterWar film1978
Filming locations nearby
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Landscapes & nature Diablo Lake
United States · 30 km north-west
Reservoir in Washington, United States
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Landmarks & buildings
Skagit River Hydroelectric Project
United States · 32 km north-west
Place in Washington listed on National Register of Historic Places
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Landscapes & nature
Railroad Creek
United States · 35 km south
Tributary to Lake Chelan in Chelan County, Washington, United States of America
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Landscapes & nature
Okanogan–Wenatchee National Forest
United States · 40 km east
National forest in Washington state, United States of America