Armstrong Redwoods State Natural Reserve

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Armstrong Redwoods State Natural Reserve
IUCN category V (protected landscape/seascape)[1]
One of the park's redwoods, the Icicle Tree
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Location	Sonoma County, California, United States
Nearest city	Guerneville, California
Coordinates	38°32′17″N 123°0′36″W / 38.53806°N 123.01000°W / 38.53806; -123.01000
Area	805 acres (326 ha)
Established	1934
Governing body	California Department of Parks and Recreation

Armstrong Redwoods State Natural Reserve is a state park of California in the United States established to preserve 805 acres (326 ha) of coast redwoods (Sequoia sempervirens). The reserve is located in Sonoma County, just north of Guerneville.

The reserve is in a temperate rainforest. The climate is mild and wet. The park receives an average of 55 inches (1.4 m) of rainfall per year, almost all between September and June. Abundant fog during the summer months helps to maintain the moist conditions required by the coast redwoods.