Diamond Lake

General Information

County: Poweshiek
Location: 1 mile West of Montezuma
Acres: 98.00
Maximum Depth: 19.8 ft. (2013)
Motoring Restrictions: Electric Motors Only

Nearby Parks

Amenities

Amenities at Diamond Lake include:
  • Boat Access
  • Fishing Jetty
  • Picnic Area
  • Trails
  • Accessible Facilities
  • Playground
  • Restrooms
  • Camping
  • Good/Excellent Shorefishing
  • Hard Surface Boat Ramp
  • Accessible Shoreline
There is very little safe ice south of Highway 30 at this time. For more information, contact the Lake Macbride Fisheries Station at 319-624-3615.
Most of the lake is skimmed over with ice but there are some open areas as well.
Download Printable Lake Map
Download Printable Fishing Structures Map

You can zoom in on the map for bathymetric information for some lakes

  • 09/13/2021 - 1,764 Channel Catfish (8.8)
  • 10/01/2019 - 1,767 Channel Catfish (9.6)
  • 09/26/2018 - 1,780 Channel Catfish (8.7)
  • fall 2016 - 1,765 Channel Catfish (9.1")
  • 09/16/2014 - 1,764 Channel Catfish (8")
    No known aquatic invasive species have been found
The Fishing Regulations brochure is available for download. The summaries listed below are a partial listing provided for your benefit.

  • Black Bullhead
    • Season: Continuous
    • Daily Bag Limit: unlimited
    • Possession Limit: unlimited
    • Length Limit: none
    • Other:
  • Black Crappie
    • Season: Continuous
    • Daily Bag Limit: combined black and white crappie, 25 fish
    • Possession Limit: unlimited
    • Length Limit: none
    • Other: No daily limit on private waters
  • Bluegill
    • Season: Continuous
    • Daily Bag Limit: 25 fish
    • Possession Limit: unlimited
    • Length Limit: none
    • Other: No daily limit on private waters
  • Channel Catfish
    • Season: Continuous
    • Daily Bag Limit: combined: channel, blue and flathead catfish, 8 fish
    • Possession Limit: combined: channel, blue and flathead catfish, 30 fish
    • Length Limit: none
    • Other:
  • Common Carp
    • Season: Continuous
    • Daily Bag Limit: none
    • Possession Limit: unlimited
    • Length Limit: none
    • Other: May be taken by hand fishing, by snagging, by spear or by bow and arrow, day or night.
  • Largemouth Bass
    • Season: Continuous
    • Daily Bag Limit: combined black bass, 3 fish
    • Possession Limit: combined black bass, 6 fish
    • Length Limit: 15-inch minimum
    • Other:
  • Walleye
    • Season: Continuous
    • Daily Bag Limit: combined walleye, sauger and saugeye; 5 fish
    • Possession Limit: combined walleye, sauger and saugeye; 10 fish
    • Length Limit: none
    • Other:
  • White Crappie
    • Season: Continuous
    • Daily Bag Limit: combined black and white crappie, 25 fish
    • Possession Limit: unlimited
    • Length Limit: none
    • Other: No daily limit on private waters
  • Yellow Bass
    • Season: Continuous
    • Daily Bag Limit: none
    • Possession Limit: unlimited
    • Length Limit: none
    • Other:
Good numbers of bluegill up to 8-inches. There are some redear sunfish here that are mostly 7- to 9-inches. Crappie numbers are good with two sizes represented most often; 6 1/2-inch fish and the 8- to 9-inch fish. Common carp are taking hold with large numbers of 14- to 20-inch fish. Channel catfish numbers are good with 12- to 19-inch fish most common. Largemouth bass numbers are fair with all sizes of bass up to 21-inches. (2015)
Tip: Click the arrow in the lower right corner to view the Fish Survey Data tool in full-screen mode.

Contacts

Iowa-Caught Fish Are Safe to Eat, In Almost All Cases

The vast majority of Iowa’s streams, rivers and lakes offer safe and high-quality fish that pose little or no threat to human health if consumed. Some limitations may apply for young children and pregnant women. Here’s a Fish Consumption Fact Sheet from the Iowa DNR and the Iowa Dept. of Public Health for more information.