Illinois River Fishing Regulations
Jackson County, Colorado · 2026 size limits, bag limits, and seasons
Illinois River is a river in Jackson County, Colorado. It has its own fishing regulations for 7 species, including Brook Trout, Brown Trout, Cutthroat Trout, and Golden Trout. These rules replace Colorado's statewide limits on this water.
Map of Illinois River
Fish with special rules on Illinois River
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Illinois River limits by species (2026)
| Species | Size limit | Daily bag | Season |
|---|---|---|---|
| All Fish SpeciesArtificial Only | – | – | Year-round |
 Brook Trout | – | 2 | Year-round |
 Brown Trout | – | 2 | Year-round |
 Cutthroat Trout | – | 2 | Year-round |
 Golden Trout | – | 2 | Year-round |
 Lake Trout | – | 2 | Year-round |
 Rainbow Trout | – | 2 | Year-round |
 Steelhead | – | 2 | Year-round |
– means no limit is listed for this water. Rules not shown here follow Colorado's statewide regulations.
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Illinois River fishing: common questions
What fish have special regulations on Illinois River?
7 species have rules specific to Illinois River: Brook Trout, Brown Trout, Cutthroat Trout, Golden Trout, Lake Trout, Rainbow Trout, and Steelhead.
What is the brook trout limit on Illinois River?
No size limit is listed for Brook Trout on Illinois River, and the daily bag limit is 2.
What is the brown trout limit on Illinois River?
No size limit is listed for Brown Trout on Illinois River, and the daily bag limit is 2.
What is the cutthroat trout limit on Illinois River?
No size limit is listed for Cutthroat Trout on Illinois River, and the daily bag limit is 2.
Do Colorado statewide fishing rules apply on Illinois River?
Where Illinois River has its own rule for a species, that rule replaces the statewide limit. For species not listed on this page, Colorado's statewide regulations apply. Regulations are set by the Colorado Parks and Wildlife; confirm with the official 2026 regulations before keeping a fish.
Other Colorado waters with special regulations
- South Platte River
- Yampa River
- Colorado River
- White River
- Poudre River · Larimer
- Gunnison River
- Blue River · Grand, Summit
- Roaring Fork River
- Arkansas River · Chaffee , Lake , Fremont , Pueblo
- Animas River · La Plata
- Eagle River · Eagle
- Taylor River
Take Illinois River rules on the water
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