How deep is Bolton Lake, Lower?

Bolton Lake, Lower reaches a maximum depth of 18 feet in the CT DEEP Lake Bathymetry survey. Most of it is far shallower: the survey charts 7 closed depth contours over about 175 acres, and half of that water sits inside the 12 ft line.

Where is the deepest part of Bolton Lake, Lower?

The deepest charted water on Bolton Lake, Lower lies inside the 18 ft contour, toward the southwestern corner of the lake. That contour encloses 1.7 acres, 1% of the mapped water, so it is a small target on a small water, the depth chart above gives the contour to line up on.

How much of Bolton Lake, Lower is shallower than 12 feet?

About half. The 12 ft contour encloses 25 acres of the roughly 175 acres inside the outer 0 ft line, so the other half of the water is shallower than 12 feet. The sharpest drop is between 9 and 12 feet, where the mapped water sheds 101 acres.

How accurate is this Bolton Lake, Lower 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

Bolton Lake, Lower depth map

Bolton Lake, Lower in Bolton, Connecticut reaches a depth of 18 feet. Bolton Lake, Lower is charted here across 7 closed depth contours, from the 0 ft line down to 18 ft, enclosing about 175 acres of water. Half of that water lies inside the 12 ft line, and only 1.7 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

Bolton Lake, Lower depth chart: 7 depth contours from 0 to 18 ft

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

Bolton Lake, Lower depth chart data: water enclosed by each contour
Depth contour	Water inside it	Share of mapped water
0 ft	175 acres	100%
3 ft	160 acres	92%
6 ft	147 acres	84%
9 ft	126 acres	72%
12 ft	25 acres	14%
15 ft	4.8 acres	2.8%
18 ft	1.7 acres	1%

Acreages are computed from the closed CT DEEP Lake Bathymetry contour rings, with islands subtracted. Shares are of the 175 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 Bolton Lake, Lower: steep sides for its size

About 175 acres of Bolton Lake, Lower sit inside the survey's 0 ft contour, and half of that water is already gone by the 12 ft line: depth comes quickly here, with no long shallow margin before the bottom drops away. The steepest break on the chart runs from 9 down to 12 ft: 101 acres of bottom fall away across 3 ft there, which makes that band the first contour to work. The deepest 18 ft contour holds 1.7 acres, 1% of the mapped water, toward the southwestern corner of the lake. At 18 ft top to bottom, weed growth shapes this water more than depth does, but the 1.7-acre deep spot still concentrates fish in the heat of summer, and the one-contour depressions on the chart are the ones most anglers row straight over.

Ice fishing on Bolton Lake, Lower

Shallow water like Bolton Lake, Lower is usually among the first to make safe ice, and with only 1.7 acres inside the 18 ft contour the fish have very little deep water to spread into once the weed beds die back. That hole, and the subtle single-contour depressions across the 175-acre basin, are where to start. Check ice thickness locally before you walk out.

Bolton Lake, Lower depth map FAQs

How deep is Bolton Lake, Lower?: Bolton Lake, Lower reaches a maximum depth of 18 feet in the CT DEEP Lake Bathymetry survey. Most of it is far shallower: the survey charts 7 closed depth contours over about 175 acres, and half of that water sits inside the 12 ft line.
Where is the deepest part of Bolton Lake, Lower?: The deepest charted water on Bolton Lake, Lower lies inside the 18 ft contour, toward the southwestern corner of the lake. That contour encloses 1.7 acres, 1% of the mapped water, so it is a small target on a small water, the depth chart above gives the contour to line up on.
How much of Bolton Lake, Lower is shallower than 12 feet?: About half. The 12 ft contour encloses 25 acres of the roughly 175 acres inside the outer 0 ft line, so the other half of the water is shallower than 12 feet. The sharpest drop is between 9 and 12 feet, where the mapped water sheds 101 acres.
How accurate is this Bolton Lake, Lower 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 Bolton Lake, Lower

Bolton Lake, Middle depth map · 18 ft max · 1 mi away
Shenipsit Lake depth map · 60 ft max · 6 mi away
Coventry Lake depth map · 36 ft max · 6 mi away
Crystal Lake depth map · 42 ft max · 10 mi away
Keeney Cove depth map · 24 ft max · 12 mi away

Mapped fishing venues near Bolton Lake, Lower

Bolton Lake, Lower in the venue directory covers access and fishing details for this water.

Bolton Lake, Middle · 1 mi away
Shenipsit Lake · 6 mi away
Coventry Lake · 6 mi away

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