Hidden Valley is a hiking trail in Sioux City, Iowa. It is within Stone State Park. It is 0.4 miles long and begins at 1,325 feet altitude. Traveling the entire trail is 0.8 miles with a total elevation gain of 404 feet. The Kestrel Point viewpoint can be seen along the trail. The trail ends near the Bobsled Run viewpoint. There is also an information map near the end of the trail.
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