Mariner's Cove is the best neighborhood!

​We sure think so, and hope you do, too.

Located in Third Lake, Illinois, Mariner’s Cove is a unique community of 338 homes nestled in an area with abundant recreational opportunities. Mariner’s Cove sits between Druce Lake and Third Lake, and borders the Rollins Savanna Forest Preserve. With 225 acres of water for fishing, boating and swimming, Mariner’s Cove has the feel of an intimate resort area in the heart of bustling Lake County, Illinois.

The community is friendly, supportive, caring and outgoing." - resident of 7 years

Upcoming Meetings/Events

Next Homeowners Association Meeting:​​

• MCCA meetings are held on the 4th Wednesday of the month at 7 p.m. at the Village of Third Lake Town Hall. ​ Please check our Facebook group or email us at [email protected] about details for any meeting.

Mariner's Cove Car Meet:

• We are pleased to invite all Mariner's Cove residents to a Neighborhood Car Meet on May 23rd from 10:00 AM to 3:00 PM at Druce Lake Beach Circle Drive.  This is intended to be a relaxed, informal gathering where neighbors can come together, connect, and enjoy a shared appreciation for vehicles of all kinds. There will be no judging and no awards, just a friendly opportunity to share and enjoy the day.  All vehicles are welcome, whether they have two, three, or four wheels. Every vehicle has a story, and we would love to hear yours, even if that vehicle is no longer part of your life.  We hope you’ll join us for a fun and memorable neighborhood event!  Please email the event organizer, Diego Caro at [email protected], for more details.

Mariner's Cove Neighborhood Garage Sale

• Please save the date for the Annual Mariner's Cove Garage Sale: June 11th-13th, 2026 from 8am-3pm.​

Mariner's Cove Summer Fun Fest 

• Come and spend the afternoon with your Cove neighbors and enjoy some summer fun!
• Saturday, July 18;  3:00pm - 7:00pm at the big park on Mainsail
• Bring the whole family and enjoy:
  •  Large Inflatable Obstacle Course
  •  Face Painter
  •  Yard Games
  •  Smash Burger Food Truck and Kona Truck
  •  Volleyball
  •  Music…and more!
  •  BYOB
•  Bring lawn chairs and blankets so you can relax and stay a while

Connect With Your Neighbors

Connect with your Mariner's Cove neighbors on Facebook! Join the private Mariner's Cove Community Facebook page here.

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​Fertilizer Impact on Third and Druce Lakes

The use of phosphorous containing fertilizers on our lawns can have a negative impact on our neighborhood retention ponds and our lakes. Stormwater runoff from neighborhood yards, driveways, and streets flow to the street storm sewer drainage system which discharges into the neighborhood retention pond and eventually to Druce and Third lakes. The phosphorous contained in the runoff can contribute to algae blooms in our ponds. These algae blooms can enter our lakes creating unhealthy conditions for swimming, boating, and fishing. Phosphorous also contributes to excess vegetation growth in our ponds and lakes, especially invasive plants. Please refrain from using fertilizers containing phosphorous on your lawns. Please see the links below for articles regarding phosphorous use:

​1) Third Lake Village Vine- Phosphorous Use and Native Plantings
https://www.thirdlakevillage.com/wp-content/uploads/2018/10/7_18_Vine_WEB.pdf
2) IEPA Lake Notes- Phosphorous and Pesticides
https://epa.illinois.gov/content/dam/soi/en/web/epa/documents/water/conservation/lake-notes/fertilizers-pesticides.pdf
3) Lake County Health Department- Phosphorous in Fertilizers
https://www.lakecountyil.gov/DocumentCenter/View/3720/Phosphorus-in-Lake-County-PDF
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Community Links

Mariner's Cove Facebook Group
Village of Third Lake (check here for Village announcements including spring raising and fall lowering of lake levels) 
Lake County Official Website