Where is Marathon Lake?

Marathon Lake is a lake in Smith County, Mississippi. Its water-quality measurements are published by MDEQ and shown on this page as reported.

Are there boat ramps on Marathon Lake?

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

Can I fish at Marathon Lake?

Marathon 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 Mississippi's fish and wildlife agency, so check its current regulations before you go.

Are there campgrounds on Marathon Lake?

Marathon Lake has 1 public campground from USGS The National Map within 5 km, including Marathon Lake. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.

Marathon Lake

Smith County, Mississippi42 acresView map Directions

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

Area

42 acres

Surface area

Shoreline

1.8 mi

Measured length

Public access

See the measurements Directions Where to stay

Marathon Lake in Smith County, Mississippi has water-quality measurements published by MDEQ, shown here as reported. Surface area: 42 acres.

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Marathon Lake is a 42-acre lake in Smith County, Mississippi. Limited fish-species data available. Public access is available with 1 public boat landing.

Source: EPA Water Quality Portal sampling records, your state environmental agency. Methodology: how these readings are compared.

What Marathon Lake is good for

From access and monitoring records, not editorial picks.

Boat launch1 documented ramp
Camping1 public campground nearby

Swimming conditions

No reading

Not rated

Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.

Whether Marathon Lake is safe to swim in today is a call for the Mississippi Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Marathon Lake

These are the measurements MDEQ publishes for Marathon 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 Marathon Lake

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

Lake Details

Surface area

42 acres

Shoreline

1.8 mi

Public access

Yes

Listed by MDEQ

No bathymetric survey has been published for Marathon Lake, so its depth is not documented here.

Recreation & Access

Boat Landings

Yes

Public Access

Campgrounds

Marathon LakePublic

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

Public campgrounds near Marathon Lake

Marathon Lake0.2 km

Nearest public campgrounds in the USGS National Map inventory, within about 3 miles. An empty list means USGS records no campground that close, which is not the same as camping being unavailable. Where the source gives an official reservation link, it is used; the cabin and hotel search does not cover campsites. More camping lakes

Stays via Stay22

Stays near Marathon Lake

Compare lakeside cabins, hotels, and vacation rentals near Marathon Lake in Smith County, Mississippi — 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.

Top-rated places to stay near Marathon Lake

Prices for Oct 9–11, 4 adults. Change dates on the map below.

Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.

Follow Marathon Lake’s readings

Email me when new measurements post for this lake. Updates stay free.

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Fishing Marathon Lake

→ Marathon Lake fishing regulations (limits, seasons, special rules)

Nearby Lakes in Smith County

Greentree Reservoir6.1 miView →Beaver Lake16.7 miView →Lake Ross Barnett—View →County Pond20.3 miView →Cooper Lake19.3 miView →Lake Claude Bennett3.2 ft clear · Eutrophic20.2 miView →

Frequently asked questions about Marathon Lake

Where is Marathon Lake?: Marathon Lake is a lake in Smith County, Mississippi. Its water-quality measurements are published by MDEQ and shown on this page as reported.
What is the water quality of Marathon Lake?: Marathon Lake in Smith County, Mississippi has water-quality measurements published by MDEQ, shown here as reported. Surface area: 42 acres.
Is Marathon Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Are there boat ramps on Marathon Lake?: Marathon Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Marathon Lake. Public access is listed as yes.
Can I fish at Marathon Lake?: Marathon 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 Mississippi's fish and wildlife agency, so check its current regulations before you go.
Are there campgrounds on Marathon Lake?: Marathon Lake has 1 public campground from USGS The National Map within 5 km, including Marathon Lake. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.