Lost Lake Fishing Regulations
Larimer County, Colorado · 2026 size limits, bag limits, and seasons
Lost Lake is a lake in Larimer 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.
Fish with special rules on Lost Lake
Tap a fish for identification tips, size records, and the best bait.
Lost Lake limits by species (2026)
| Species | Size limit | Daily bag | Season |
|---|---|---|---|
| All Fish SpeciesArtificial Only | – | – | Always open |
 Brook Trout | – | Catch & release only | Year-round |
 Brown Trout | – | Catch & release only | Year-round |
 Cutthroat Trout | – | Catch & release only | Year-round |
 Golden Trout | – | Catch & release only | Year-round |
 Lake Trout | – | Catch & release only | Year-round |
 Rainbow Trout | – | Catch & release only | Year-round |
 Steelhead | – | Catch & release only | Year-round |
– means no limit is listed for this water. Rules not shown here follow Colorado's statewide regulations.
Plan your Lost Lake trip
Lost Lake fishing: common questions
What fish have special regulations on Lost Lake?
7 species have rules specific to Lost Lake: Brook Trout, Brown Trout, Cutthroat Trout, Golden Trout, Lake Trout, Rainbow Trout, and Steelhead.
What is the brook trout limit on Lost Lake?
Brook Trout are catch and release only on Lost Lake.
What is the brown trout limit on Lost Lake?
Brown Trout are catch and release only on Lost Lake.
What is the cutthroat trout limit on Lost Lake?
Cutthroat Trout are catch and release only on Lost Lake.
Is Lost Lake catch and release?
Some rules on Lost Lake are catch and release only, covering Brook Trout, Brown Trout, Cutthroat Trout, Golden Trout, and Lake Trout and others. Check the table for the section and dates that apply.
Do Colorado statewide fishing rules apply on Lost Lake?
Where Lost Lake 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 Lost Lake rules on the water
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