Walleye Stocked · 20 plants · last June 2, 2026 Best: dawn, dusk, night Diamond Lake fishing
Diamond Lake fishing is stocked with Walleye on a natural lake. Also recorded: Bluegill, Yellow perch, Largemouth bass, Smallmouth bass, Northern pike, Black crappie, and 6 more. It is stocked about 0.4 times a year since 1979, most often in April and June. Species guides list dawn, dusk, and night for Walleye, Black crappie, and Rock bass, dawn, day, and dusk for Bluegill, Yellow perch, and Northern pike, and dawn and dusk for Largemouth bass and Smallmouth bass.
- Last stocked
- June 2, 2026
- · Walleye
- Plants on record
- 20
- Since 1979
- Species stocked
- 1 (+12 also recorded)
- Surface acres
- 1,040.1
Fish at Diamond Lake
Around the dates Diamond Lake is stocked, Open-Meteo's 2016-2025 archive puts mean air temperature at 69.7°F in June, 46.9°F in April, 59.2°F in May, 65.8°F in September. That is air temperature at these coordinates, not water temperature. Open-Meteo
Walleye Stocked · 20 plants · last June 2, 2026 Best: dawn, dusk, night 
Bluegill Confirmed present Best: dawn, day, dusk Best: dawn, day, dusk
Bluegill species guide
Yellow perch Confirmed present Best: dawn, day, dusk Best: dawn, day, dusk
Yellow perch species guide
Largemouth bass Confirmed present Best: dawn, dusk Best: dawn, dusk
Largemouth bass species guide
Smallmouth bass Confirmed present Best: dawn, dusk Best: dawn, dusk
Smallmouth bass species guide
Northern pike Confirmed present Best: dawn, day, dusk Best: dawn, day, dusk
Northern pike species guide
Black crappie Confirmed present Best: dawn, dusk, night Best: dawn, dusk, night
Black crappie species guide
Rock bass Confirmed present Best: dawn, dusk, night Best: dawn, dusk, night
Rock bass species guide
Pumpkinseed Confirmed present Best: dusk Best: dusk
Pumpkinseed species guide Warmouth Confirmed present
Bullhead Confirmed present
Bowfin Confirmed present Best: day, night Best: day, night
Bowfin species guide
Longnose gar Confirmed present Best: day Best: day
Longnose gar species guideDiamond Lake, located in Cass County, Michigan, historically supported fishing activity. Indians who lived around Diamond Lake created fishing canoes by cutting large trees and hollowing them out. These canoes were then used to catch whitefish and enormous pike in the lake. (dlacassopolis.org, accessed October 5, 2026)
Drafted by AI from the cited sources and checked before publishing.
How Diamond Lake is stocked
No plants recorded in 33 years between 1979 and 2026.
Fish stocked in 1979
1,000,000
Fish stocked in 1980
1,000,000
Fish stocked in 1981
2,000,000
Fish stocked in 1982
2,000,000
Fish stocked in 1992
6,935
Fish stocked in 1994
1,819
Fish stocked in 2011
52,886
Fish stocked in 2012
50,871
Fish stocked in 2014
53,031
Fish stocked in 2016
50,840
Fish stocked in 2017
3,345
Fish stocked in 2019
52,374
Fish stocked in 2021
56,143
Fish stocked in 2023
59,686
Fish stocked in 2026
46,637
Stocking history
| Date | Species | Quantity | Avg. length | Source |
|---|---|---|---|---|
| June 2, 2026 | Walleye | 46,637 | – | report |
| June 1, 2023 | Walleye | 59,686 | – | report |
| May 26, 2021 | Walleye | 34,635 | – | report |
| May 25, 2021 | Walleye | 21,508 | – | report |
| June 5, 2019 | Walleye | 26,187 | – | report |
| June 4, 2019 | Walleye | 26,187 | – | report |
| October 12, 2017 | Walleye | 3,345 | – | report |
| June 2, 2016 | Walleye | 50,840 | – | report |
| June 3, 2014 | Walleye | 53,031 | – | report |
| May 23, 2012 | Walleye | 50,871 | – | report |
| June 7, 2011 | Walleye | 52,886 | – | report |
| November 3, 1994 | Walleye | 1,819 | – | report |
| September 9, 1992 | Walleye | 3,321 | – | report |
| September 3, 1992 | Walleye | 487 | – | report |
| July 31, 1992 | Walleye | 3,127 | – | report |
| April 30, 1982 | Walleye | 565,000 | – | report |
| April 30, 1982 | Walleye | 1,435,000 | – | report |
| April 17, 1981 | Walleye | 2,000,000 | – | report |
| April 23, 1980 | Walleye | 1,000,000 | – | report |
| May 2, 1979 | Walleye | 1,000,000 | – | report |
Access and facts
- Water type
- natural lake
- Nearest town
- Cassopolis, MI
- Facilities
- restrooms, dock
DNR public launch with a hard-surfaced ramp (2 lanes, 1 pier), parking for about 60 vehicles with trailers and a vault toilet, run by the DNR Cassopolis field office. Shallow water at the ramp makes the largest boats hard to launch. The lake also has a marina.
Drafted by AI from the cited sources and checked before publishing.
Advisories, closures, regulations and water conditions change. Check the Michigan Department of Natural Resources before you go.
Nearest lakes
Common questions
What fish are at Diamond Lake?
Fishing Diamond Lake usually means Walleye. All 20 plants on record are Walleye. Walleye was last stocked June 2, 2026. Bluegill, Yellow perch, Largemouth bass, and Smallmouth bass, plus 8 more are recorded here outside the stocking reports.
When is Diamond Lake stocked?
Last stocked June 2, 2026. It is stocked about 0.4 times a year since 1979, most often in April and June. No plants recorded in 33 years between 1979 and 2026.
How do you get on Diamond Lake?
The nearest town is Cassopolis, MI. Facilities include restrooms and dock. DNR public launch with a hard-surfaced ramp (2 lanes, 1 pier), parking for about 60 vehicles with trailers and a vault toilet, run by the DNR Cassopolis field office. Shallow water at the ramp makes the largest boats hard to launch. The lake also has a marina.