Diamond Lake

General Information

County: Poweshiek
Location: 1 mile West of Montezuma
Acres: 98.00
Maximum Depth: 22 ft. (1976)
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
For more information, contact the Lake Macbride Fisheries Station at 319-624-3615.
Bluegill - Fair: Small worms or jigs tipped with worms are working.
Remember, minnows are not allowed here.
Black Crappie - Fair: Anglers are catching fish off the jetties. Jigs tipped with worms are working best. Most fish are 8-9".
Download Printable Lake Map
Download Printable Fishing Structures Map

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

  • fall 2016 - 1,765 Channel Catfish (9.1")
  • 09/16/2014 - 1,764 Channel Catfish (8")
  • 09/14/2012 - 2,744 Channel Catfish (8.3")
  • 05/10/2012 - 1,016 Northern Pike (3.0")
  • 05/19/2011 - 1,559 Northern Pike (2.8")
  • 05/13/2010 - 7,171 Channel Catfish (5.0")
  • 05/05/2010 - 1,051 Northern Pike (2.5")
  • 05/08/2009 - 1,000 Northern Pike (3.0")
  • 04/09/2009 - 26 Grass Carp (10")
  • 10/21/2008 - 50 Grass Carp (8.0")
  • 06/05/2008 - 7,000 Channel Catfish (5.2")
  • 05/08/2008 - 1,126 Northern Pike (2.3")
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 being represented most often, the 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 here. 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)

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. Here is a list of current fish consumption advisories for Iowa lakes and rivers.