Arkansas’s largest lake sits in a rare mountain range — with a forest underwater

It’s the state’s cleanest secret

Lake Ouachita (say it WAH-shi-tah) spreads across more than 40,000 acres of water in the Ouachita Mountains of west-central Arkansas. It stretches about 30 miles across Garland and Montgomery counties, making it the largest lake entirely within the state.

More than 690 miles of shoreline wrap around it, and no homes line the banks. The whole thing sits just 13 miles from Hot Springs.

The water is some of the cleanest in the country, and what lives in it might surprise you.

A flooded valley with a forest still standing below

The U. S.

Army Corps of Engineers built Blakely Mountain Dam on the Ouachita River between 1948 and 1953. The dam rises 231 feet and was made for flood control and hydroelectric power.

Before the valley flooded, nobody cleared the trees.

So an entire forest still stands beneath the surface, with some of those trees reaching more than 60 feet tall. The lake’s name comes from the Choctaw words "Owa Chito," meaning "big hunt.

" The 1. 8-million-acre Ouachita National Forest surrounds it completely.

Camp on any of 200 islands for free

More than 200 islands dot the lake, and every one of them used to be a high mountain ridge before the valley flooded.

Lake Ouachita is the only Corps of Engineers lake in Arkansas where you can camp on the islands, and it costs nothing because they sit inside the national forest. Some islands draw crowds.

Hotel Island has sandy beaches and small caves. Others are tiny, unnamed rock outcroppings where you might not see another person all day.

Crystal Island is covered in milky white quartz that catches the sun.

Dive into sunken forests and quartz-streaked cliffs

At least 30 dive spots sit below the surface, and you can see up to 50 feet through the water.

Divers find sunken forests, rock formations, quartz veins and remains of old settlements that went under when the lake filled.

At Blakely Mountain Dam, an underwater stairway leads down to sunken boats and vehicles, with the rock face dropping close to 200 feet. Zebra Rock is a favorite spot where white quartz veins cut through dark sandstone.

You can even spear fish here during certain months.

Dime-sized jellyfish that don’t sting

Lake Ouachita is home to freshwater jellyfish, tiny translucent creatures about the size of a dime. They don’t sting, and they only show up in the cleanest freshwater lakes.

Your best chance to spot them near the surface is in August and September, especially on sunny days. Freshwater sponges also grow on submerged rocks and logs around the lake, ranging from tan to green.

Freshwater shrimp live here too, another sign that the water quality is about as good as it gets.

Float a 300-million-year-old geology trail by boat

The Geo-Float Trail runs 16 miles along the lakeshore with 12 stops, each one highlighting a different geological formation.

When it opened in 1984, it became the first water-based interpretive trail in the National Trails System. The Army Corps of Engineers, the Arkansas Geological Commission and the U.

S. Geological Survey all helped create it.

At Checkerboard Point, sandstone cracked into cube-like patterns when the mountains formed. At another stop, rock layers bent into S-curves from colliding continental plates.

The formations along the trail date back 250 to 300 million years.

Seven species of bass, walleye and catfish

Anglers come from across the country for this lake.

It holds largemouth bass, smallmouth bass, spotted bass, striped bass, crappie, walleye and catfish, and it ranks as the top striped bass lake in Arkansas.

Changing water levels create different habitats that keep the fish populations varied and healthy. Large tributaries branch off the main body into quiet coves and channels where you can work a line in peace.

More than 100 uninhabited islands give you miles of shoreline structure that pulls fish in close.

80 bald eagles hunt fish here every winter

Around 80 bald eagles migrate to Lake Ouachita each winter.

They start arriving as early as October and stay through February or March, perching in the tall pines along the undeveloped shoreline to hunt fish in the clear water.

Lake Ouachita State Park runs guided eagle watch tours on a covered barge from November through February. Each tour lasts about 90 minutes and goes out several days a week.

Along the way, you might also see osprey, hawks, herons, loons and other waterfowl.

Three springs once sold as "World’s Wonder Waters"

Three Sisters Springs sits inside Lake Ouachita State Park and has been flowing since at least 1875.

Homesteader John McFadden claimed the water had healing powers and reportedly named the springs after his three daughters.

By the early 1900s, someone had built a resort with cottages and a bottling plant right on the site.

The bottled water sold across the country as "World’s Wonder Waters," with each spring said to cure a different ailment. All three springs still flow today, and you can walk the grounds and see the old springhouse area.

Dig your own quartz crystals in Mount Ida

The nearby town of Mount Ida calls itself the Quartz Crystal Capital of the World.

The Ouachita Mountains hold some of the richest quartz crystal deposits on Earth, formed over millions of years by hydrothermal activity deep underground.

Several public mines let you dig for your own crystals with simple tools like screwdrivers and garden trowels. Crystals pulled from this area have ended up in museums and collections worldwide because of their clarity.

Arkansas made quartz crystal the official state mineral in 1976.

Swim, paddle and ski on water 200 feet deep

The lake has multiple swimming beaches, including two at the state park with no entrance fee.

Boating, water skiing, kayaking and stand-up paddleboarding all work well on the wide-open water, and several marinas around the lake rent boats and kayaks.

The average depth sits around 50 feet, but near the dam it drops to roughly 200 feet.

Kayakers and canoers can paddle out to the islands, slip into quiet coves or follow the Geo-Float Trail at their own pace.

Explore Lake Ouachita State Park in Arkansas

You can start your trip at Lake Ouachita State Park, located at 5451 Mountain Pine Road in Mountain Pine, Ark. The park stays open year-round, and there is no entrance fee for day-use areas.

The visitor center is open daily from 8 a. m.

to 5 p. m.

Inside the park you’ll find 93 campsites, eight full cabins, four camper cabins, a marina and swimming beaches.

The lake has about 20 access points spread across its 30-mile length, so figure out which end you want before you go.

Mount Ida and its crystal mines sit on the western end, while Hot Springs is a short drive from the east.

This article was created with AI assistance and human editing.

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