Johnstown Reservoir Fishing Regulations
Weld County, Colorado · 2026 size limits, bag limits, and seasons
Johnstown Reservoir is a reservoir in Weld County, Colorado. It has its own fishing regulations for 7 species, including Black Crappie, Crappie, Largemouth Bass, and Sauger. These rules replace Colorado's statewide limits on this water.
Map of Johnstown Reservoir
Fish with special rules on Johnstown Reservoir
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Johnstown Reservoir limits by species (2026)
| Species | Size limit | Daily bag | Season |
|---|---|---|---|
 Black Crappie | 10" min | – | Always open |
| Crappie | 10" min | – | Always open |
 Largemouth Bass | 15" min | – | Always open |
 Sauger | 15" min | – | Always open |
| 21" min | 1 | Always open | |
 Smallmouth Bass | 15" min | – | Always open |
 Walleye | 15" min | – | Always open |
| 21" min | 1 | Always open | |
 White Crappie | 10" min | – | Always open |
– means no limit is listed for this water. Rules not shown here follow Colorado's statewide regulations.
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Johnstown Reservoir fishing: common questions
What fish have special regulations on Johnstown Reservoir?
7 species have rules specific to Johnstown Reservoir: Black Crappie, Crappie, Largemouth Bass, Sauger, Smallmouth Bass, Walleye, and White Crappie.
What is the black crappie limit on Johnstown Reservoir?
Black Crappie must be at least 10" to keep on Johnstown Reservoir.
What is the crappie limit on Johnstown Reservoir?
Crappie must be at least 10" to keep on Johnstown Reservoir.
What is the largemouth bass limit on Johnstown Reservoir?
Largemouth Bass must be at least 15" to keep on Johnstown Reservoir.
Do Colorado statewide fishing rules apply on Johnstown Reservoir?
Where Johnstown Reservoir 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
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