Dillon Reservoir Fishing Regulations
Summit County, Colorado · 2026 size limits, bag limits, and seasons
Dillon Reservoir is a reservoir in Summit County, Colorado. It has its own fishing regulations for 2 species, including Arctic Char and Brown Trout, set separately for 2 sections of the reservoir. These rules replace Colorado's statewide limits on this water.
Map of Dillon Reservoir
Fish with special rules on Dillon Reservoir
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Dillon Reservoir limits by species (2026)
Entire reservoir
| Species | Size limit | Daily bag | Season |
|---|---|---|---|
 Arctic CharArctic char limit 1, minimum 20 inches · Brown trout over 14 inches must be released immediately | 20" min | 1 | Year-round |
Entire reservoir
| Species | Size limit | Daily bag | Season |
|---|---|---|---|
 Brown Trout | 14" min | Catch & release only | Always open |
– means no limit is listed for this water. Rules not shown here follow Colorado's statewide regulations.
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Dillon Reservoir fishing: common questions
What fish have special regulations on Dillon Reservoir?
2 species have rules specific to Dillon Reservoir: Arctic Char and Brown Trout.
What is the arctic char limit on Dillon Reservoir?
Arctic Char must be at least 20" to keep on Dillon Reservoir (entire reservoir), and the daily bag limit is 1.
What is the brown trout limit on Dillon Reservoir?
Brown Trout are catch and release only on Dillon Reservoir (entire reservoir).
Is Dillon Reservoir catch and release?
Some rules on Dillon Reservoir are catch and release only, covering Brown Trout. Check the table for the section and dates that apply.
Do Colorado statewide fishing rules apply on Dillon Reservoir?
Where Dillon 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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