Calaveras Big Trees State Park in Arnold CA   While California's high Sierras have a plethora of infinitely beautiful and unique areas to explore, few are as coveted as Calaveras Big Trees State Park in Arnold. Big Trees State Park is open to visitors year-round and is California's;s longest continuously operated tourist facility. Located at 4,800 feet in elevation, the park boasts an impressive 6,000+ acres which includes two groves of giant Sequoias, camping and picnicking areas, miles of developed hiking trails, fishing opportunities, and breathtaking scenery. The "Discovery Tree" stump is a popular stop for anyone visiting the park. Other attractions include the Agassiz Tree, the largest in the park, and the Lava Bluffs Trail, which affords beautiful displays of the areas;s indigeno... 06/01/2013