Michigan lake depth maps
Second Fortune Lake depth map
Second Fortune Lake in Iron County, Michigan reaches a depth of 80 feet. Second Fortune Lake is charted here across 16 closed depth contours, from the 5 ft line down to 80 ft, enclosing about 131 acres of water. Half of that water lies inside the 35 ft line, and only under an acre 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
Second Fortune Lake depth chart: 16 depth contours from 5 to 80 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 | 131 acres | 100% |
| 10 ft | 116 acres | 89% |
| 15 ft | 98 acres | 75% |
| 20 ft | 90 acres | 68% |
| 25 ft | 82 acres | 63% |
| 30 ft | 74 acres | 57% |
| 35 ft | 62 acres | 47% |
| 40 ft | 49 acres | 38% |
| 45 ft | 32 acres | 24% |
| 50 ft | 20 acres | 16% |
| 55 ft | 15 acres | 11% |
| 60 ft | 11 acres | 8.6% |
| 65 ft | 4.7 acres | 3.6% |
| 70 ft | 3 acres | 2.3% |
| 75 ft | 1.7 acres | 1.3% |
| 80 ft | under 1 acre | under 1% |
Acreages are computed from the closed Michigan DNR Inland Lake Contours contour rings, with islands subtracted. Shares are of the 131 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 Second Fortune Lake: a stepped drop into deep water
The survey encloses about 131 acres of Second Fortune Lake inside its 5 ft contour, and half of that water lies inside the 35 ft line, so the drop to the deep basin comes in stages, each contour giving up another slice of water, rather than in one abrupt wall. Between 10 and 15 ft the mapped water sheds 18 acres in 5 ft of depth, the sharpest change on the chart, start on that band, because it is where the bottom stops being flat. Inside the 80 ft contour there is under an acre of water, toward the eastern side of the lake: a single pocket rather than a basin, and worth a drift over in high summer. 80 ft of water makes this a two-story fishery: warm-water fish hold the 5-to-35 ft ground while the basin can stay cold below the summer thermocline, and the traffic between the two runs along the 10–15 ft break at first and last light.
Ice fishing on Second Fortune Lake
Second Fortune Lake 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 80 ft hole. The 10–15 ft band on the chart above is that edge: 18 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 5-to-35 ft flat. Check ice thickness locally before you walk out.
Second Fortune Lake depth map FAQs
- How deep is Second Fortune Lake?
- Second Fortune Lake reaches a maximum depth of 80 feet in the Michigan DNR Inland Lake Contours survey. Most of it is far shallower: the survey charts 16 closed depth contours over about 131 acres, and half of that water sits inside the 35 ft line.
- Where is the deepest part of Second Fortune Lake?
- The deepest charted water on Second Fortune Lake lies inside the 80 ft contour, toward the eastern side of the lake. That contour encloses under an acre, 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 Second Fortune Lake is shallower than 35 feet?
- About half. The 35 ft contour encloses 62 acres of the roughly 131 acres inside the outer 5 ft line, so the other half of the water is shallower than 35 feet. The sharpest drop is between 10 and 15 feet, where the mapped water sheds 18 acres.
- How accurate is this Second Fortune 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 Second Fortune Lake
- First Fortune Lake depth map · 70+ ft max · 1 mi away
- Long Lake depth map · 105 ft max · 3 mi away
- Chicagon Lake depth map · 110+ ft max · 4 mi away
- Stager Lake depth map · 55 ft max · 8 mi away
- Iron Lake depth map · 45+ ft max · 12 mi away
Mapped fishing venues near Second Fortune Lake
Second Fortune Lake in the venue directory covers access and fishing details for this water.
- First Fortune Lake · 1 mi away
- Long Lake · 3 mi away
- Chicagon Lake · 4 mi away
Fishing in Michigan needs a state license: Michigan fishing license guide · all Michigan venues