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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
No recent updates
Download Printable Lake Map

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

  • 9/26/22 - 151 Channel Catfish (9.3)
    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.

  • 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:
Following renovation in 2020, the fishery in Mariposa Lake has had a slower than anticipated return to good fishing. The lake was restocked in 2020 with Largemouth Bass, Bluegill, Black Crappie and Channel Catfish. Bluegills surveyed in 2023 were 4.5- to 6-inches. Only one black crappie has been surveyed despite multiple stockings. Largemouth Bass were 4- to 16.5-inches. Channel Catfish have done well and were 8.5- to 22-inches in 2023.(2023)
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. Here is a list of current fish consumption advisories for Iowa lakes and rivers.