Michigan lake depth maps
Mona Lake depth map
Mona Lake in Muskegon County, Michigan reaches a depth of 42 feet. Mona Lake is charted here across 5 closed depth contours, from the 5 ft line down to 40 ft, enclosing about 670 acres of water. Half of that water lies inside the 30 ft line, and only 34 acres lie inside the deepest one. Every contour is on the interactive map below, free and without an account.
Data: Michigan DNR Inland Lake Contours (public record). Contours closed, checked and area-computed by Jordan Carter, founder of GilledIt · page updated
Mona Lake depth chart: 5 depth contours from 5 to 40 ft
Data: Michigan DNR Inland Lake Contours (public record), retrieved August 2026 · depths change over time · not for navigation
| Depth contour | Water inside it | Share of mapped water |
|---|---|---|
| 5 ft | 670 acres | 100% |
| 10 ft | 530 acres | 79% |
| 20 ft | 413 acres | 62% |
| 30 ft | 215 acres | 32% |
| 40 ft | 34 acres | 5% |
Acreages are computed from the closed Michigan DNR Inland Lake Contours contour rings, with islands subtracted. Shares are of the 670 acres inside the outermost charted contour (the 5 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. The survey also records a 42 ft sounding, marked as a point rather than a closed contour, so it is not charted as a band.
Fishing Mona Lake: steep sides for its size
About 670 acres of Mona Lake sit inside the survey's 5 ft contour, and half of that water is already gone by the 30 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 5 down to 10 ft: 140 acres of bottom fall away across 5 ft there, which makes that band the first contour to work. 34 acres, 5% of the mapped water, lie inside the deepest 40 ft contour, toward the southwestern 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 5 and 10 ft lines pinch together, hardest in early season and again as fish follow bait back down in autumn.
Ice fishing on Mona Lake
Mona 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 40 ft hole, all 34 acres of it; as the sun gets up, move onto the 5–10 ft break, and spend the middle of the day on the flats inside the 30 ft line. Check ice thickness locally before you walk out.
Mona Lake depth map FAQs
- How deep is Mona Lake?
- Mona Lake reaches a maximum depth of 42 feet in the Michigan DNR Inland Lake Contours survey. Most of it is far shallower: the survey charts 5 closed depth contours over about 670 acres, and half of that water sits inside the 30 ft line. The 42 ft figure is a single recorded sounding rather than a closed contour, so the deepest line you can actually trace on the map is 40 ft.
- Where is the deepest part of Mona Lake?
- The deepest charted water on Mona Lake lies inside the 40 ft contour, toward the southwestern corner of the lake. That contour encloses 34 acres, 5% of the mapped water, so it is a small target on a big lake, the depth chart above gives the contour to line up on.
- How much of Mona Lake is shallower than 30 feet?
- About half. The 30 ft contour encloses 215 acres of the roughly 670 acres inside the outer 5 ft line, so the other half of the water is shallower than 30 feet. The sharpest drop is between 5 and 10 feet, where the mapped water sheds 140 acres.
- How accurate is this Mona Lake depth map?
- The contours come from the Michigan DNR Inland Lake Contours 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 Mona Lake
- Muskegon Lake depth map · 66+ ft max · 5 mi away
- Half Moon Lake depth map · 82 ft max · 23 mi away
- Fremont Lake depth map · 88+ ft max · 24 mi away
- Lake Macatawa depth map · 40 ft max · 28 mi away
- Ryerson Lake depth map · 80+ ft max · 29 mi away
Mapped fishing venues near Mona Lake
Mona Lake in the venue directory covers access and fishing details for this water.
- Muskegon Lake · 5 mi away
- Vigil Cove · 19 mi away
- Half Moon Lake · 23 mi away
Fishing in Michigan needs a state license: Michigan fishing license guide · all Michigan venues