Henry Cowell Redwoods State Park. This park features 15 miles of hiking and riding trails through a forest that looks much the same as it did 200 years ago. The tallest tree is about 285 feet tall and about 16 feet wide while the oldest trees range from about 1400 to 1800 years old. For more information, visit www.parks.ca.gov/default.asp?page_id=546.