Horsetooth Reservoir Fishing Regulations

Larimer County, Colorado · 2026 size limits, bag limits, and seasons

Horsetooth Reservoir is a reservoir in Larimer County, Colorado. It has its own fishing regulations for 2 species, including Smallmouth Bass and Walleye. These rules replace Colorado's statewide limits on this water.

2 species with limits

Official Colorado regulations ↗Colorado statewide limits →Colorado license costs →

Aerial map of Horsetooth Reservoir, Larimer County, Colorado — 40.5583, -105.1595Directions ↗

Fish with special rules on Horsetooth Reservoir

Tap a fish for identification tips, size records, and the best bait.

Smallmouth Bass

12" min

Walleye

21–24" slot · 2/day

Horsetooth Reservoir limits by species (2026)

Species	Size limit	Daily bag	Season
All Fish SpeciesInlet area as posted	–	–	Mar 15 – May 31 · Closed
Smallmouth Bass	12" min	–	Year-round
Walleye	21–24" slot	2	Year-round

– means no limit is listed for this water. Rules not shown here follow Colorado's statewide regulations.

Plan your Horsetooth Reservoir trip

Colorado fishing regulations →

Statewide size limits, bag limits, and seasons for every species.

Colorado fishing license →

Costs for residents and non-residents, and where to buy.

All Colorado waters →

Every Colorado lake and river with its own fishing rules.

Horsetooth Reservoir fishing: common questions

What fish have special regulations on Horsetooth Reservoir?

2 species have rules specific to Horsetooth Reservoir: Smallmouth Bass and Walleye.

What is the smallmouth bass limit on Horsetooth Reservoir?

Smallmouth Bass must be at least 12" to keep on Horsetooth Reservoir.

What is the walleye limit on Horsetooth Reservoir?

Walleye have a 21–24" slot limit on Horsetooth Reservoir, and the daily bag limit is 2.

Do Colorado statewide fishing rules apply on Horsetooth Reservoir?

Where Horsetooth 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