Mason Reservoir Fishing Regulations
Colorado · 2026 size limits, bag limits, and seasons
Mason Reservoir is a reservoir, 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.
Fish with special rules on Mason Reservoir
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Mason Reservoir limits by species (2026)
| Species | Size limit | Daily bag | Season |
|---|---|---|---|
| All Fish SpeciesArtificial Only | – | – | Year-round |
 Brook Trout | 16" max | 1 | Year-round |
 Brown Trout | 16" max | 1 | Year-round |
 Cutthroat Trout | 16" max | 1 | Year-round |
 Golden Trout | 16" max | 1 | Year-round |
 Lake Trout | 16" max | 1 | Year-round |
 Rainbow Trout | 16" max | 1 | Year-round |
 Steelhead | 16" max | 1 | Year-round |
– means no limit is listed for this water. Rules not shown here follow Colorado's statewide regulations.
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Mason Reservoir fishing: common questions
What fish have special regulations on Mason Reservoir?
7 species have rules specific to Mason Reservoir: Brook Trout, Brown Trout, Cutthroat Trout, Golden Trout, Lake Trout, Rainbow Trout, and Steelhead.
What is the brook trout limit on Mason Reservoir?
Brook Trout have a maximum size of 16" on Mason Reservoir, and the daily bag limit is 1.
What is the brown trout limit on Mason Reservoir?
Brown Trout have a maximum size of 16" on Mason Reservoir, and the daily bag limit is 1.
What is the cutthroat trout limit on Mason Reservoir?
Cutthroat Trout have a maximum size of 16" on Mason Reservoir, and the daily bag limit is 1.
Do Colorado statewide fishing rules apply on Mason Reservoir?
Where Mason 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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