Where is Mark Twain Lake?

Mark Twain Lake is a lake in Monroe County, Missouri. Its water-quality measurements are published by Missouri DNR and shown on this page as reported.

How deep is Mark Twain Lake?

Mark Twain Lake has a maximum depth of 92.8 feet. The lake covers 3086 acres.

Are there boat ramps on Mark Twain Lake?

Mark Twain Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Route 466. Public access is listed as yes.

Can I fish at Mark Twain Lake?

Mark Twain Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Missouri's fish and wildlife agency, so check its current regulations before you go.

Mark Twain Lake

Monroe County, Missouri3,086 acresView map Directions

No nutrient or algae sampling on record from Missouri DNR for this lake.

Max depth

92.8 ft

Bathymetric survey

Area

3,086 acres

Surface area

Shoreline

39.2 mi

Measured length

Impaired · Mercury
93 ft max depth
Public access

See the measurements Directions Where to stay

Mark Twain Lake in Monroe County, Missouri has water-quality measurements published by Missouri DNR, shown here as reported. Maximum depth: 92.8 ft. Surface area: 3086 acres.

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Mark Twain Lake is a 3,086-acre lake in Monroe County, Missouri with a maximum depth of 93 feet. Limited fish-species data available. Public access is available with 1 public boat landing.

Source: EPA Water Quality Portal sampling records, Missouri DNR. Methodology: how these readings are compared.

What Mark Twain Lake is good for

From access and monitoring records, not editorial picks.

Boat launch1 documented ramp
Deep water92.8 ft surveyed max depth
Big water3,086 acres

Swimming conditions

No reading

Not rated

Nutrient and algae readings are not a swimming clearance. Mark Twain Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.

Whether Mark Twain Lake is safe to swim in today is a call for the Missouri Department of Natural Resources and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Mark Twain Lake

These are the measurements Missouri DNR publishes for Mark Twain Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.

No clarity data. TSI undefined.

Ask about Mark Twain Lake

Answers come straight from the public measurements and survey records on this page.

Lake Details

Max depth

92.8 ft

Surface area

3,086 acres

Shoreline

39.2 mi

Public access

Yes

Listed by Missouri DNR

Recreation & Access

Boat Landings

Yes

Public Access

Route 466Public

Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps

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Stays near Mark Twain Lake

Compare lakeside cabins, hotels, and vacation rentals near Mark Twain Lake in Monroe County, Missouri — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.

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Fishing Mark Twain Lake

→ Mark Twain Lake fishing regulations (limits, seasons, special rules)

EPA Impairment Status

Mark Twain Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).

Causes of impairment

Mercury

Designated uses not supporting: Fish consumption.

Source: EPA ATTAINS assessment unit MO_7033.00 · Official waterbody report

Nearby Lakes in Monroe County

Monroe City Lake B10.1 miView →Mark Twain Lake Indian Creek Arm3.8 ft clear · Eutrophic9.3 miView →Hunnewell Lake3.2 ft clear · Eutrophic13 miView →Perry City Lake12.3 miView →Shelbina Lake—View →Oasis Ranch Lake14.1 ft clear · Oligotrophic—View →

Frequently asked questions about Mark Twain Lake

Where is Mark Twain Lake?: Mark Twain Lake is a lake in Monroe County, Missouri. Its water-quality measurements are published by Missouri DNR and shown on this page as reported.
What is the water quality of Mark Twain Lake?: Mark Twain Lake in Monroe County, Missouri has water-quality measurements published by Missouri DNR, shown here as reported. Maximum depth: 92.8 ft. Surface area: 3086 acres.
Is Mark Twain Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Mark Twain Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
How deep is Mark Twain Lake?: Mark Twain Lake has a maximum depth of 92.8 feet. The lake covers 3086 acres.
Are there boat ramps on Mark Twain Lake?: Mark Twain Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Route 466. Public access is listed as yes.
Can I fish at Mark Twain Lake?: Mark Twain Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Missouri's fish and wildlife agency, so check its current regulations before you go.