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. The official Michigan survey maps 14 depth bands across 42 contour lines. This free map of First Fortune Lake shows every surveyed contour as an interactive depth chart you can use to plan a session before you travel.
First Fortune Lake depth chart: 14 depth bands to 70+ ft
Data: Michigan DNR Inland Lake Contours (public record), retrieved August 2026 · depths change over time · not for navigation
| Depth contour | Share of mapped area inside it |
|---|---|
| 5 ft | about 100% |
| 10 ft | about 44% |
| 15 ft | about 32% |
| 20 ft | about 27% |
| 25 ft | about 23% |
| 30 ft | about 16% |
| 35 ft | about 10% |
| 40 ft | about 6% |
| 45 ft | about 4% |
| 50 ft | about 2% |
| 55 ft | about 1% |
| 70 ft | under 1% |
Share of the surveyed surface area enclosed by each depth contour, computed from the Michigan DNR Inland Lake Contours data.
How to fish First Fortune Lake: deep, two-story water
At 70 feet, this is a two-story fishery: warm-water species work the shallows and weed edges while the deep basin can hold cold-water fish below the summer thermocline. In summer, target the transition where the bottom breaks from the shallow shelf toward the basin; fish suspend along that edge at dawn and dusk. The 14 mapped depth bands make it straightforward to find those breaks before you launch.
Ice fishing on First Fortune Lake
On deep water like First Fortune Lake, the winter bite concentrates along the first major drop-off rather than the deepest basin. Use the contours above to find where the shallow shelf breaks toward deep water and set up on that edge; panfish and walleye slide up and down it through the day. Late ice often pushes fish shallower again. Always verify ice thickness locally before walking out, and remember deep lakes freeze later and less evenly than shallow ones.
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, with 14 depth bands mapped in total.
- Where is the deepest part of First Fortune Lake?
- The deepest surveyed water on First Fortune Lake sits toward the middle of the lake, inside the 70 ft contour. The interactive depth map above shows the full basin outline and the breaks leading into it.
- How accurate is this First Fortune Lake depth map?
- The contours come from the Michigan DNR Inland Lake Contours survey. 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.
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