Meramec River Float Trips

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The Meramec River runs about 218 miles through the eastern Missouri Ozarks. The stretch between Sullivan and Steelville is the closest real float trip to St. Louis, roughly an hour from the city. Three stops anchor most trips here: Meramec State Park, Onondaga Cave State Park, and Meramec Caverns, each with its own cave tour. Weekday paddles are quiet. Summer holiday weekends on the lower river get crowded fast.

I’ve floated a lot of Ozark rivers over the years. My favorite thing about the Meramec is what it isn’t: as wild as the Jacks Fork or the Current, though it carries the same cold, spring-fed water. I’ve camped along the Ozark National Scenic Riverways more than once, and the Meramec runs the same way, just with more concrete ramps and more coolers. That’s the tradeoff for being an hour from St. Louis instead of three. If you are building a weekend around the city, our St. Louis weekend itinerary covers the city side.

Floating here means picking a stretch, not just a river. The upper river near Onondaga Cave runs quiet most days. The Sullivan-to-Steelville corridor is where the tubes and coolers show up on holiday weekends.

Stop	River Access	Miles / Time	Crowd Level
Meramec State Park	Park launch, canoe/raft rental with shuttle	Half or full day, renter’s choice	Family-friendly, moderate
Onondaga Cave State Park	Bank access near Vilander Bluff, no on-site rental	Bring your own boat	Quiet most days
Meramec Caverns (Stanton)	Shuttle bus upriver, float back to the caverns	6 miles, 3–5 hours	Popular, family-friendly
Sullivan–Steelville corridor	Multiple private liveries	Half day to full day	Busy on summer holiday weekends

Meramec State Park

Meramec State Park sits right on the river near Sullivan. The park is built around Fisher Cave almost as much as the water. Trained guides walk visitors through by hand-held light — no electric lighting, no paved trail, just lanterns and rock.

Fisher Cave Meramec River

The park runs regular Fisher Cave tours from late May through mid-September. A shorter educational season stretches into April and October. Its cave-tour page prices adult tickets at $14 and kids 6 to 12 at $10; children under 6 get in free. Tours can be booked online ahead of time, or bought on the spot at the cave building. Groups need to reserve at least two weeks out. In peak summer, tours run at 9:30, 11:30, 1 and 3 daily, with an extra morning slot added on Memorial Day and Labor Day weekends.

The river does the rest of the work. Swimming, fishing, rafting and boating are all fair game in park waters. The River Stop Store rents canoes and rafts by the half-day or full-day, shuttle included. A float here doesn’t require hauling your own gear from home.

Onondaga Cave State Park

Onondaga Cave earns its name honestly. A paved, electrically lit walkway leads visitors just under a mile past formations like the King’s Canopy and the Twins. A guide leads the whole way. The state park’s cave-tour listing prices the standard walk at $23 for adults and $13 for kids 6 to 12. It runs about an hour and 15 minutes start to finish.

Cathedral Cave is the quieter option. It’s a lantern tour that starts at the campground showerhouse, with a short hike up Deer Run Trail before you’re underground. The tour runs about two hours total and caps out at 20 people. It costs $15 for adults and $10 for kids, on that same page. Buying both tours the same day runs cheaper than paying separately. Weekday mornings tend to sell out in the shoulder months — mid-April through May, and again in September. A weekend slot can actually be easier to land than a weekday one in those windows.

The river side of the park gets less attention than the caves. That’s part of the appeal. It’s good water for canoeing and fishing, and the Vilander Bluff Natural Area gives a panoramic view over it from up top. There’s no rental concession on-site here. Bring your own boat, or launch from Meramec State Park or Meramec Caverns and paddle up to it instead.

Meramec Caverns

Meramec Caverns sits off I-44 at Stanton, and it runs its own show. Lit walkways, a well-worn tour route, a gift shop that leans hard into the Jesse James story. Meramec Caverns’ own site puts the walking tour at an hour and 20 minutes, over a mile and a quarter. Tickets run $30.50 for adults and $16.50 for kids 5 to 11. A shorter, 45-minute version is available for groups.

The Jesse James connection is the caverns’ own claim. It’s built on what the attraction calls sheriffs’ reports, eyewitness accounts, and items found at a spot on-site called Loot Rock — strongboxes, rifles, shackles, tied to a real 19th-century train robbery. Take it as the attraction’s story. It’s told the way a roadside legend gets told, not something we can independently verify.

Floating is the other half of a Meramec Caverns visit. The attraction prices its own float at a flat six miles, averaging three to five hours. A shuttle bus runs paddlers upriver first, so the trip ends back at the caverns. Kayaks, canoes and rafts all rent by the boat. Weekday rates run a bit cheaper than weekend rates, and returning late adds an hourly fee. The caverns also run their own riverside campground, with a camp store, for anyone staying more than a day.

Steelville Missouri

Steelville calls itself the “Floating Capital of Missouri” on its own website, and the title fits. The town sits at the bottom of the busiest stretch of the whole river. Private canoe and tube liveries line the banks and fill up fast on Memorial Day, the Fourth of July and Labor Day weekends. As a base, Steelville has gas, groceries and enough lodging to cover a group split between a cabin and a couple of campsites.

Coolers, music and crowded gravel bars are the normal scene down here on a summer Saturday. If that’s not the trip you want, go up instead. The upper river near Onondaga Cave sees a fraction of the boat traffic the lower river does. Missouri State Parks’ own site notes that weekday floats offer substantially more solitude than weekend ones.

Either way, plan around the calendar more than the map. A Tuesday float near Onondaga Cave and a Saturday float out of Steelville can feel like two different rivers entirely. The Meramec is the same kind of easy big-city escape that Starved Rock is for Chicago.

Meramec River Camping

Camping options track the three main stops. Meramec State Park runs the biggest campground of the three, with basic, electric and full-hookup loops. Showers run April through October, and reservations open up to a year in advance. Onondaga Cave State Park’s campground doubles as the starting point for the Cathedral Cave lantern tour. A site there puts you a short walk from that trailhead.

Meramec Caverns runs its own private campground and camp store next to the caverns themselves. It’s aimed more at float-trip customers than backcountry campers. None of the three require a tent — RVs and trailers are common at all of them. Private liveries around Sullivan and Steelville add still more sites, mostly geared toward groups floating the busy stretch rather than a quiet weekend away.

We’ve pitched a tent along enough Ozark rivers to know the shade is real out here. Expect proper hardwood cover over most sites, not gravel and open sun. Basic sites skip the hookups and cost less. Electric and full-hookup loops run more, but mean an actual water spigot instead of hauling jugs from the shower house.

Is Meramec Caverns Worth It?

We’d put Meramec Caverns and Onondaga Cave on different lists, honestly. Meramec Caverns is the bigger production — the Jesse James story, the gift shop, a float trip built right into the visit. It earns an afternoon if a roadside spectacle is what you’re after. Onondaga Cave is the quieter, more serious cave tour of the two. It’s got the Cathedral Cave lantern option for anyone who wants fewer people in the room.

Doing both caves in one trip works fine if the caves are the whole point of the day. Trying to squeeze in a float on the same day usually means picking one cave, not two. The tours and the shuttle both eat hours you don’t get back. Traveling with younger kids tips the scale toward Meramec Caverns. The tour runs shorter, and the float trip afterward gives them something to do besides walk.

Is the Meramec River Safe?

A few questions we hear most about floating this river.

Is the Meramec River safe to float?
Yes, for anyone comfortable on moving water. Wear a life jacket, and skip the trip after heavy rain when the current runs fast and off-color. Treat the rock ledges near the caves with respect — they’re slicker than they look.

How long does the Meramec Caverns float take?
Meramec Caverns prices its own float at six miles, averaging three to five hours. A shuttle bus runs paddlers upriver first.

Is Onondaga Cave or Meramec Caverns better to visit?
Onondaga Cave is the quieter, more serious cave tour. Meramec Caverns is the bigger show, Jesse James story included. Most people pick based on which story interests them more, not which cave is objectively better.

Where can I float the Meramec River without the crowds?
Above Meramec State Park, near Onondaga Cave, and on a weekday rather than a summer weekend. The Sullivan-to-Steelville stretch is the one to skip if quiet is the goal.

Prices are approximate, current as of publication, and change frequently — confirm the latest price with the retailer before buying.

Published September 28, 2026.