California's largest public cave chamber with rappelling, cave tours, zip lines, and gemstone mining.
Moaning Cavern Adventure Park near Vallecito is home to California’s largest public cave chamber — a massive underground cathedral that could fit the Statue of Liberty inside. Named for the eerie moaning sound that once echoed from its entrance, the cavern offers a 165-foot rappel to the cave floor, a 235-step spiral staircase tour, and an expedition tour that goes deep into undeveloped passages. Above ground, the adventure park features zip lines, a climbing tower, and gemstone mining for kids. It’s one of the most thrilling family destinations in the Motherlode.
Summer (May–Sep)
Daily 9 AM – 5 PM
Winter (Oct–Apr)
Weekends 10 AM – 4 PM
Zip Line
Seasonal — weekends spring & summer
Descend 235 steps into the largest public cave chamber in California. Great for all ages.
Rappel 165 feet straight down into the main chamber — an unforgettable adrenaline rush.
Crawl, climb, and squeeze through undeveloped cave passages with a guide.
Soar above the treetops on a dual zip line course.
Pan for gemstones and fossils — a perfect activity for young explorers.
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