How deep is West Branch Reservoir?

West Branch Reservoir reaches a maximum depth of 90 feet in the CT DEEP Lake Bathymetry survey. Most of it is far shallower: the survey charts 10 closed depth contours over about 202 acres, and half of that water sits inside the 50 ft line.

Where is the deepest part of West Branch Reservoir?

The deepest charted water on West Branch Reservoir lies inside the 90 ft contour, toward the southeastern corner of the lake. That contour encloses 1 acres, under 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 West Branch Reservoir is shallower than 50 feet?

About half. The 50 ft contour encloses 82 acres of the roughly 202 acres inside the outer 0 ft line, so the other half of the water is shallower than 50 feet. The sharpest drop is between 0 and 10 feet, where the mapped water sheds 30 acres.

How accurate is this West Branch Reservoir 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

West Branch Reservoir depth map

West Branch Reservoir in Hartland, Connecticut reaches a depth of 90 feet. West Branch Reservoir is charted here across 10 closed depth contours, from the 0 ft line down to 90 ft, enclosing about 202 acres of water. Half of that water lies inside the 50 ft line, and only 1 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

West Branch Reservoir depth chart: 10 depth contours from 0 to 90 ft

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

West Branch Reservoir depth chart data: water enclosed by each contour
Depth contour	Water inside it	Share of mapped water
0 ft	202 acres	100%
10 ft	172 acres	85%
20 ft	145 acres	72%
30 ft	125 acres	62%
40 ft	106 acres	53%
50 ft	82 acres	41%
60 ft	53 acres	26%
70 ft	29 acres	15%
80 ft	8.1 acres	4%
90 ft	1 acres	under 1%

Acreages are computed from the closed CT DEEP Lake Bathymetry contour rings, with islands subtracted. Shares are of the 202 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 West Branch Reservoir: steep walls and a big basin

The survey encloses about 202 acres of West Branch Reservoir inside its 0 ft contour, and half of that water lies inside the 50 ft line, so depth comes quickly here, with no long shallow margin before the bottom drops away. Between 0 and 10 ft the mapped water sheds 30 acres in 10 ft of depth, the sharpest change on the chart, start on that band, because it is where the bottom stops being flat. The deepest 90 ft contour holds 1 acres, under 1% of the mapped water, toward the southeastern corner of the lake. 90 ft of water makes this a two-story fishery: warm-water fish hold the 0-to-50 ft ground while the basin can stay cold below the summer thermocline, and the traffic between the two runs along the 0–10 ft break at first and last light.

Ice fishing on West Branch Reservoir

West Branch Reservoir freezes later and less evenly than the shallow waters around it, and the winter bite sets up on the first real break rather than out over the 90 ft hole. The 0–10 ft band on the chart above is that edge: 30 acres of bottom tilt away there, and panfish and walleye slide up and down it through the day. Late ice pushes fish back onto the 0-to-50 ft flat. Check ice thickness locally before you walk out.

West Branch Reservoir depth map FAQs

How deep is West Branch Reservoir?: West Branch Reservoir reaches a maximum depth of 90 feet in the CT DEEP Lake Bathymetry survey. Most of it is far shallower: the survey charts 10 closed depth contours over about 202 acres, and half of that water sits inside the 50 ft line.
Where is the deepest part of West Branch Reservoir?: The deepest charted water on West Branch Reservoir lies inside the 90 ft contour, toward the southeastern corner of the lake. That contour encloses 1 acres, under 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 West Branch Reservoir is shallower than 50 feet?: About half. The 50 ft contour encloses 82 acres of the roughly 202 acres inside the outer 0 ft line, so the other half of the water is shallower than 50 feet. The sharpest drop is between 0 and 10 feet, where the mapped water sheds 30 acres.
How accurate is this West Branch Reservoir 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 West Branch Reservoir

Colebrook River Reservoir depth map · 130 ft max · 3 mi away
Highland Lake depth map · 60 ft max · 7 mi away
McDonough Lake depth map · 50 ft max · 8 mi away
West Hill Pond depth map · 60 ft max · 8 mi away
Winchester Lake depth map · 16 ft max · 9 mi away

Mapped fishing venues near West Branch Reservoir

West Branch Reservoir in the venue directory covers access and fishing details for this water.

Colebrook River Reservoir · 3 mi away
Highland Lake · 7 mi away
McDonough Lake · 8 mi away

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