The DNR uses three categories to classify the different types of trout streams throughout Wisconsin. They require annual stocking of trout to provide trout fishing. Generally, there is no carryover of trout from one year to the next.There are 1,786 miles of Class 3 trout streams in Wisconsin and they comprise 14% of Wisconsin's total trout stream mileage.Trout stream classifications or reclassifications are reviewed and updates to the trout stream classification list may occur every other year. The stream biologist will publish a public notice in a newspaper or other media to inform local residents. These are evident in High-quality trout waters that have sufficient natural reproduction to sustain populations of wild trout, at or near carry capacity.

These streams or stream sections are often small and may contain small or slow-growing trout, especially in the headwaters.There are 5,365 miles of Class 1 trout streams in Wisconsin and they comprise 40% of Wisconsin's total trout stream mileage. The notice will also be published here for statewide distribution. Consequently, streams in this category require no stocking of hatchery trout.

Consequently, streams in this category require no stocking of hatchery trout.

These streams have good survival and carryover of adult trout, often producing some fish larger than average size.There are 6,120 miles of Class 2 trout streams in Wisconsin and they comprise 46% of Wisconsin's total trout stream mileage.These waters are marginal trout habitat with no natural reproduction occurring. These streams or stream sections are often small and may contain small or slow-growing trout, especially in the headwaters.There are 5,365 miles of Class 1 trout streams in Wisconsin and they comprise 40% of Wisconsin's total trout stream mileage.Streams in this classification may have some natural reproduction, but not enough to utilize available food and space. High quality trout waters that have sufficient natural reproduction to sustain populations of wild trout, at or near carry capacity. Call 1-888-936-7463 (TTY Access via relay - 711) from 7 a.m. to 10 p.m. The Department will waive any hearing requirement on this classification unless a written request for a hearing is received within 30 days of the posting date Therefore, stocking is required to maintain a desirable sport fishery.