Ha Ha Tonka State Park
No admission feeHike boardwalks to the stone ruins of a hilltop castle above Lake of the Ozarks, plus a natural bridge, sinkholes, caves and a big spring.

Photo: rjones0856, CC BY 2.0, via Wikimedia Commons. Cropped and resized.
A Missouri state park centered on a large cold spring, known for trout fishing, camping, and hiking.
26250 Highway 64A, Lebanon, MO 65536-6797 · Lebanon, MO
Bennett Spring State Park sits in a valley around a spring that pours out a very large volume of clear, cool water each day. The official park site describes it as one of Missouri's earliest state parks, drawing anglers who fish a spring branch stocked with rainbow trout. Beyond fishing, visitors can use campgrounds, cabins, a dining lodge, picnic areas, and hiking trails. Wikipedia places the park west of Lebanon on Highway 64 in Dallas and Laclede counties, and notes that the spring feeds the Niangua River and lends the park its name.
The closest stops to Bennett Spring State Park, ordered by straight-line distance. A few more like it, plus some different kinds of fun so you can build a full day.
Hike boardwalks to the stone ruins of a hilltop castle above Lake of the Ozarks, plus a natural bridge, sinkholes, caves and a big spring.
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Swim, boat, fish, hike and tour a cave along 85 miles of shoreline in Missouri's largest state park.
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Ride a Jeep-drawn tram through a show cave along the path of an ancient underground river, a fully ride-through tour.
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Guided cave tour near Lake of the Ozarks with underground formations, a gift shop and an in-cave escape room.
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A Missouri state park on a peninsula in Truman Lake, known for fishing, boating, swimming, hiking, and camping.
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