Mariposa Lake

General Information

County: Jasper
Location: 5 miles northeast of Newton
Acres: 17.60
Maximum Depth: 20.1 ft. (2021 - 20.1 feet)
Motoring Restrictions:

Nearby Parks

Rock Creek State Park

Amenities

Amenities at Mariposa Lake include:

• Fishing Jetty
• Picnic Area
• Playground
• Restrooms
• Camping
• Good/Excellent Shorefishing
• Hard Surface Boat Ramp

Fishing Report

No recent updates

Popular Fish Species at this Lake

• Bluegill
• Channel Catfish
• Largemouth Bass

Lake Maps

Download Printable Lake Map

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

Fish Stocking

• 9/26/22 - 151 Channel Catfish (9.3)
• 06/04/2020 - 1,300 Channel Catfish (1.8)
• 03/17/2020 - 5,250 Bluegill (4)

Aquatic Invasive Species

    No known aquatic invasive species have been found

Regulations

The Fishing Regulations brochure is available for download. The summaries listed below are a partial listing provided for your benefit.

• 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:
• 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:

Fishing Forecast

Following renovation in 2020, the fishery in Mariposa Lake has had a slow return to good fishing. The lake was restocked in 2020 with Largemouth Bass, Bluegill, Black Crappie and Channel Catfish. Bluegills surveyed in 2024 were still 4.5- to 6-inches. A few young 6-inch Black Crappies were surveyed. Largemouth Bass were 6- to 15.5-inches. Channel Catfish have done well and were 8- to 22.5-inches in 2024.(2024)

Fish Survey Data

Tip: Click the arrow in the lower right corner to view the Fish Survey Data tool in full-screen mode.

Contacts

• Will Brickel, Conservation Officer; 641-521-2003; william.brickel@dnr.iowa.gov
• Ben Dodd, Fisheries Biologist; 641-891-3795; Ben.Dodd@dnr.iowa.gov

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.

Return