Lake Champlain is about 400 feet (roughly 120 meters) at its deepest point, with an average depth of about 64 feet (around 20 meters).

Quick Scoop: Lake Champlain Depth

  • The maximum depth of Lake Champlain is approximately 400 feet (about 120 meters), in the main lake between Charlotte, Vermont, and Essex, New York.
  • The average depth is about 64 feet (about 19ā€“20 meters), so most of the lake is much shallower than its deepest trench.
  • In metric terms, that makes Lake Champlainā€™s deepest spots roughly as tall as a 35ā€“40 story building, while the average depth is closer to a 6-story building underwater.

Depth by Lake Region

Different parts of Lake Champlain vary a lot in depth, which matters for boating, fishing, and water temperature.

  • Main Lake: Deepest section, reaching about 120 meters (around 400 feet) north of the Thompsonā€™s Point/Split Rock area.
  • Inland Sea: Reaches up to about 50 meters (about 164 feet).
  • Malletts Bay: Generally less than about 32 meters (about 104 feet).
  • Missisquoi Bay: Very shallow, usually under about 4 meters (around 12 feet).

Why This Is a Trending Question

People ask ā€œhow deep is Lake Champlainā€ a lot in recent years because of:

  • Growing interest in lake recreation (boating, wakesurfing, fishing) and safety, where depth affects navigation and hazards.
  • New high-resolution bathymetric mapping projects from researchers between 2012 and 2020, which produced detailed modern depth maps and sparked news and forum discussions.
  • Curiosity about how Lake Champlain compares to the Great Lakes and other large North American lakes in terms of depth and volume.

Mini FAQ

  • Is Lake Champlain considered a deep lake?
    It is moderately deep: 400 feet is significant, but it is shallower and smaller in volume than the deepest Great Lakes like Superior.
  • Where exactly is the deepest point?
    The deepest hole is located in the main lake between Charlotte, Vermont, and Essex, New York, just north of the Thompsonā€™s Point/Split Rock area.
  • Does depth affect the lakeā€™s ecosystems?
    Yes, deeper areas stratify differently, influence water temperature layers, and provide different habitats compared with shallow, warmer bays such as Missisquoi Bay.

Information gathered from public forums or data available on the internet and portrayed here.