CountiesMonroe County
MissouriReservoirMonroe County
Mark Twain Lake
Mark Twain Lake covers about 18,600 acres of the Salt River in Missouri. The lake is in Monroe County. USACE St. Louis District manages it.
Coordinates39.5059, -91.7224
Surface area18,600 acres
Max depth85 ft
RiverSalt River
Managed byUSACE St. Louis District
Swimming beaches on Mark Twain Lake
No named swimming beach is mapped yet for this lake. Access is through agency day-use areas and boat ramps listed below. We add beach pages only when we can confirm a name, coordinates and an operating agency.
Mark Twain Lake on the map
Lake center, swimming spots and access points.
Weather and water temperature
Air temperature and wind from Open-Meteo. Water temperature only when the lake has a public sensor.
Weather data by Open-Meteo
Mark Twain Lake at a glance
On the map, Mark Twain Lake is centered near 39.5059, -91.7224. The surface sits around 600 feet above sea level. It reaches roughly 85 feet at its deepest. The Salt River carries the outflow.
There is no live level reading for Mark Twain Lake. The agencies that run this water do not publish one openly, and we do not estimate what has not been measured. We check the public feeds daily, so this page will fill in if one appears.
Water temperature is not measured at this lake by any public agency we read. If the water looks like pea soup or paint, stay out and report it to the managing agency. Swimming season in Missouri runs through the warm months, and day-use areas set their own opening dates.
Nearby water includes Long Branch Lake (Missouri, 47 mi), Lake Saint Louis (Missouri, 70 mi) and Creve Coeur Lake (Missouri, 86 mi). Missouri has 18 lakes on this site in total.
Around Mark Twain Lake this guide maps 8 public recreation areas. Recreation areas nearby include Robert Allen Recreation Area, Ray Behrens Recreation Area and Indian Creek Recreation Area. Unless the operating agency says otherwise, treat these as unsupervised swimming.
Recreation areas on Mark Twain Lake
8 public recreation areas mapped around the lake by the U.S. Army Corps of Engineers. Facilities vary by area; check the managing office for opening dates and fees.
Robert Allen Recreation Area Ray Behrens Recreation Area Indian Creek Recreation Area Shell Branch Recreation Area Frank Russell Recreation Area Mark Twain State Park John F. Spalding Recreation Area M.W. Boudreaux Recreation Area
Source: USACE Recreation Areas
Questions about Mark Twain Lake
Is there a beach at Mark Twain Lake?
No named swimming beach appears in the federal and state datasets this guide reads. Check the operating agency for day-use areas on the ground.
How big is Mark Twain Lake?
About 18,600 acres. Maximum depth is around 85 feet.
What other lakes are near Mark Twain Lake?
The closest in this guide is Long Branch Lake, about 47 miles away in Missouri.
Lakes near Mark Twain Lake
Other lakes in this guide, ordered by distance.
Lake of the Ozarks
Lake of the Ozarks was created by impounding the Osage River in central Missouri and covers about 54,000 acres with 1,150 miles…
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Rathbun Lake
Rathbun Lake is a 11,000-acre reservoir on the Chariton River in Iowa. Its shoreline falls inside Appanoose County. It is managed…
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Lake Springfield
Lake Springfield covers about 3,965 acres of the Sugar Creek in Illinois. Its shoreline falls inside Sangamon County. Management…
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Carlyle Lake
Fed by the Kaskaskia River, Carlyle Lake holds roughly 26,000 acres of water in Illinois. Its shoreline falls inside Clinton…
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Pomme de Terre Lake
Pomme de Terre Lake covers about 7,907 acres of the Osage River in Missouri. It lies in Hickory County. It is managed by USACE…
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Lake Jacomo
Lake Jacomo is a reservoir of some 970 acres on the Blue Springs Lake, in Missouri. The lake is in Jackson County. Management is…
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Sources
Every figure on this page comes from one of these public sources.