How deep is Crystal Lake?

Crystal Lake reaches a maximum depth of 42 feet in the CT DEEP Lake Bathymetry survey. Most of it is far shallower: the survey charts 8 closed depth contours over about 183 acres, and half of that water sits inside the 24 ft line.

Where is the deepest part of Crystal Lake?

The deepest charted water on Crystal Lake lies inside the 42 ft contour, toward the southeastern corner of the lake. That contour encloses 41 acres, 22% of the mapped water, so it is a broad slice of the bottom rather than a pinpoint target, the depth chart above gives the contour to line up on.

How much of Crystal Lake is shallower than 24 feet?

About half. The 24 ft contour encloses 85 acres of the roughly 183 acres inside the outer 0 ft line, so the other half of the water is shallower than 24 feet. The sharpest drop is between 0 and 6 feet, where the mapped water sheds 45 acres.

How accurate is this Crystal Lake depth map?

The contours come from the CT DEEP Lake Bathymetry survey, retrieved August 2026 and last rebuilt on August 19, 2026. Depths change over time with water levels and sediment, so treat this map as a planning guide for fishing, and never use it for navigation. Acreages are computed from the published contour geometry, not from a separate area survey, so read them as close approximations.

Connecticut lake depth maps

Crystal Lake depth map

Crystal Lake in Ellington, Connecticut reaches a depth of 42 feet. Crystal Lake is charted here across 8 closed depth contours, from the 0 ft line down to 42 ft, enclosing about 183 acres of water. Half of that water lies inside the 24 ft line, and only 41 acres lie inside the deepest one. Every contour is on the interactive map below, free and without an account.

Data: CT DEEP Lake Bathymetry (CC0). Contours closed, checked and area-computed by Jordan Carter, founder of GilledIt · page updated August 19, 2026

Crystal Lake depth chart: 8 depth contours from 0 to 42 ft

Data: CT DEEP Lake Bathymetry (CC0), retrieved August 2026 · depths change over time · not for navigation

Crystal Lake depth chart data: water enclosed by each contour
Depth contour	Water inside it	Share of mapped water
0 ft	183 acres	100%
6 ft	138 acres	75%
12 ft	116 acres	63%
18 ft	103 acres	56%
24 ft	85 acres	47%
30 ft	68 acres	37%
36 ft	57 acres	31%
42 ft	41 acres	22%

Acreages are computed from the closed CT DEEP Lake Bathymetry contour rings, with islands subtracted. Shares are of the 183 acres inside the outermost charted contour (the 0 ft line), which is the outer edge of the mapped water, several state files carry no 0 ft shoreline line, so this is not the same as a share of the lake's published surface area.

Fishing Crystal Lake: steep sides for its size

About 183 acres of Crystal Lake sit inside the survey's 0 ft contour, and half of that water is already gone by the 24 ft line: the bottom holds its depth well out from the bank rather than tapering off a long shallow margin. The steepest break on the chart runs from 0 down to 6 ft: 45 acres of bottom fall away across 6 ft there, which makes that band the first contour to work. 41 acres, 22% of the mapped water, lie inside the deepest 42 ft contour, toward the southeastern corner of the lake. With 42 ft at its deepest there is no true cold-water layer here, so structure does the work the thermocline does elsewhere: fish the points and inside turns where the 0 and 6 ft lines pinch together, hardest in early season and again as fish follow bait back down in autumn.

Ice fishing on Crystal Lake

Crystal Lake's 42 ft is a workable ice depth, enough water to hold fish all winter, without the slow freeze-up of a big basin. First light belongs on the 42 ft hole, all 41 acres of it; as the sun gets up, move onto the 0–6 ft break, and spend the middle of the day on the flats inside the 24 ft line. Check ice thickness locally before you walk out.

Crystal Lake depth map FAQs

How deep is Crystal Lake?: Crystal Lake reaches a maximum depth of 42 feet in the CT DEEP Lake Bathymetry survey. Most of it is far shallower: the survey charts 8 closed depth contours over about 183 acres, and half of that water sits inside the 24 ft line.
Where is the deepest part of Crystal Lake?: The deepest charted water on Crystal Lake lies inside the 42 ft contour, toward the southeastern corner of the lake. That contour encloses 41 acres, 22% of the mapped water, so it is a broad slice of the bottom rather than a pinpoint target, the depth chart above gives the contour to line up on.
How much of Crystal Lake is shallower than 24 feet?: About half. The 24 ft contour encloses 85 acres of the roughly 183 acres inside the outer 0 ft line, so the other half of the water is shallower than 24 feet. The sharpest drop is between 0 and 6 feet, where the mapped water sheds 45 acres.
How accurate is this Crystal Lake depth map?: The contours come from the CT DEEP Lake Bathymetry survey, retrieved August 2026 and last rebuilt on August 19, 2026. Depths change over time with water levels and sediment, so treat this map as a planning guide for fishing, and never use it for navigation. Acreages are computed from the published contour geometry, not from a separate area survey, so read them as close approximations.

Depth maps for lakes near Crystal Lake

Shenipsit Lake depth map · 60 ft max · 5 mi away
Bolton Lake, Middle depth map · 18 ft max · 9 mi away
Bolton Lake, Lower depth map · 18 ft max · 10 mi away
Coventry Lake depth map · 36 ft max · 12 mi away
Bigelow Pond depth map · 15 ft max · 13 mi away

Mapped fishing venues near Crystal Lake

Crystal Lake in the venue directory covers access and fishing details for this water.

Shenipsit Lake · 5 mi away
West Willington Rest Area Access · 5 mi away
Bolton Lake, Middle · 9 mi away

Fishing in Connecticut needs a state license: Connecticut fishing license guide · all Connecticut venues