Michigan lake depth maps
Lake Margrethe depth map
Lake Margrethe in Crawford County, Michigan reaches a depth of 65 feet. Lake Margrethe is charted here across 13 closed depth contours, from the 5 ft line down to 65 ft, enclosing about 1,913 acres of water. Half of that water lies inside the 20 ft line, and only 9.3 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
Lake Margrethe depth chart: 13 depth contours from 5 to 65 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 | 1,913 acres | 100% |
| 10 ft | 1,565 acres | 82% |
| 15 ft | 1,034 acres | 54% |
| 20 ft | 771 acres | 40% |
| 25 ft | 626 acres | 33% |
| 30 ft | 449 acres | 24% |
| 35 ft | 351 acres | 18% |
| 40 ft | 252 acres | 13% |
| 45 ft | 174 acres | 9.1% |
| 50 ft | 116 acres | 6.1% |
| 55 ft | 64 acres | 3.3% |
| 60 ft | 31 acres | 1.6% |
| 65 ft | 9.3 acres | under 1% |
Acreages are computed from the closed Michigan DNR Inland Lake Contours contour rings, with islands subtracted. Shares are of the 1,913 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.
Fishing Lake Margrethe: a wide shallow flat over a deep hole
About 1,913 acres of Lake Margrethe sit inside the survey's 5 ft contour, and half of that water is already gone by the 20 ft line: most of this Crawford County water is shallow and the depth is concentrated in one part of the basin. The steepest break on the chart runs from 10 down to 15 ft: 531 acres of bottom fall away across 5 ft there, which makes that band the first contour to work. 9.3 acres, under 1% of the mapped water, lie inside the deepest 65 ft contour, toward the southeastern corner of the lake. At 65 ft this is two-story water: the basin can stay cold below the summer thermocline while warm-water fish stay up on the 5-to-20 ft ground, and the fish that move between the two do it along the 10–15 ft break at first and last light.
Ice fishing on Lake Margrethe
Deep water like Lake Margrethe freezes later and less evenly than the shallow lakes around it, and the winter bite sets up on the first real break, not out over the 65 ft hole. That edge is the 10–15 ft band on the chart above, where 531 acres of bottom tilt away, and panfish and walleye work up and down it through the day. By late ice the fish push back onto the 5-to-20 ft flat. Check ice thickness locally before you walk out.
Lake Margrethe depth map FAQs
- How deep is Lake Margrethe?
- Lake Margrethe reaches a maximum depth of 65 feet in the Michigan DNR Inland Lake Contours survey. Most of it is far shallower: the survey charts 13 closed depth contours over about 1,913 acres, and half of that water sits inside the 20 ft line.
- Where is the deepest part of Lake Margrethe?
- The deepest charted water on Lake Margrethe lies inside the 65 ft contour, toward the southeastern corner of the lake. That contour encloses 9.3 acres, under 1% 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 Lake Margrethe is shallower than 20 feet?
- About half. The 20 ft contour encloses 771 acres of the roughly 1,913 acres inside the outer 5 ft line, so the other half of the water is shallower than 20 feet. The sharpest drop is between 10 and 15 feet, where the mapped water sheds 531 acres.
- How accurate is this Lake Margrethe 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 Lake Margrethe
- Blue Lake depth map · 80+ ft max · 12 mi away
- Higgins Lake depth map · 130+ ft max · 13 mi away
- Twin Lake depth map · 80+ ft max · 15 mi away
- Big Bradford Lake depth map · 102 ft max · 16 mi away
- Heart Lake depth map · 123 ft max · 18 mi away
Mapped fishing venues near Lake Margrethe
Lake Margrethe in the venue directory covers access and fishing details for this water.
- Blue Lake · 12 mi away
- West Higgins Lake Drive Road End Access · 13 mi away
- Higgins Lake · 13 mi away
Fishing in Michigan needs a state license: Michigan fishing license guide · all Michigan venues