Michigan lake depth maps
First Fortune Lake depth map
First Fortune Lake in Iron County, Michigan reaches a depth of more than 70 feet at its deepest surveyed contour. First Fortune Lake is charted here across 13 closed depth contours, from the 10 ft line down to 70 ft, enclosing about 141 acres of water. Half of that water lies inside the 30 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
First Fortune Lake depth chart: 13 depth contours from 10 to 70 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 |
|---|---|---|
| 10 ft | 141 acres | 100% |
| 15 ft | 117 acres | 83% |
| 20 ft | 97 acres | 69% |
| 25 ft | 81 acres | 57% |
| 30 ft | 60 acres | 42% |
| 35 ft | 36 acres | 25% |
| 40 ft | 22 acres | 16% |
| 45 ft | 15 acres | 11% |
| 50 ft | 8.7 acres | 6.1% |
| 55 ft | 4.7 acres | 3.3% |
| 60 ft | 2.4 acres | 1.7% |
| 65 ft | under 1 acre | under 1% |
| 70 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 141 acres inside the outermost charted contour (the 10 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 First Fortune Lake: a stepped drop into deep water
The survey encloses about 141 acres of First Fortune Lake inside its 10 ft contour, and half of that water lies inside the 30 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 24 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 70 ft contour there is under an acre of water, toward the middle of the lake: a single pocket rather than a basin, and worth a drift over in high summer. 70 ft of water makes this a two-story fishery: warm-water fish hold the 10-to-30 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 First Fortune Lake
First 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 70 ft hole. The 10–15 ft band on the chart above is that edge: 24 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 10-to-30 ft flat. Check ice thickness locally before you walk out.
First Fortune Lake depth map FAQs
- How deep is First Fortune Lake?
- First Fortune Lake is more than 70 feet deep. The deepest contour in the Michigan DNR Inland Lake Contours survey is the 70 foot line, and the lake continues deeper inside it.
- Where is the deepest part of First Fortune Lake?
- The deepest charted water on First Fortune Lake lies inside the 70 ft contour, toward the middle 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 First Fortune Lake is shallower than 30 feet?
- About half. The 30 ft contour encloses 60 acres of the roughly 141 acres inside the outer 10 ft line, so the other half of the water is shallower than 30 feet. The sharpest drop is between 10 and 15 feet, where the mapped water sheds 24 acres.
- How accurate is this First 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 First Fortune Lake
- Second Fortune Lake depth map · 80 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 First Fortune Lake
First Fortune Lake in the venue directory covers access and fishing details for this water.
- Second 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