← Lake Guide40.55° N · 105.16° W

Colorado

Horsetooth Reservoir

Horsetooth Reservoir is a reservoir of about 1,817 acres in Larimer County, Colorado, with largemouth fishing that turns on conditions and cover.

Surface
1,817acres
Primary species
Largemouth
§ 01Today on the water · Horsetooth Reservoirvia Open-Meteo · 05:30 local
Air temp
66.8°F
Barometric
29.86″
→steady 24h(+0.01)
Wind
10mph
from W
Moon
Waning Gibbous
day 19.4 · 77% lit

Air conditions sampled near the lake center, not measured on the water · refreshed ~15 min

§ 03Next 3 daysvia Open-Meteo · interpretation
  1. 31
    augMon

    Stable window

    hi 84° · lo 59°

    Anytime through the day. Quiet weather day; lean on seasonal pattern and structure.

    ── light s wind

  2. 1
    sepTue

    Watch the wind

    hi 84° · lo 59°

    Lean into wind-fed shorelines, all day. Wind drives bait position today; pick the shoreline taking it.

    ── stiff e wind · direction shift overnight

  3. 2
    sepWed

    Tougher window

    hi 88° · lo 63°

    Pick the calmest hour and stay flexible. Conditions push hard today; bite likely shrinks. Plan around the calmest gap.

    ── strong s wind · bite likely shrinks

§ 04Field notesColorado

Where it is

Horsetooth Reservoir reaches roughly 1,817 acres in Larimer County, Colorado. Across that water, largemouth trade depth and location with each season.

Seasonal pattern

Spring. As the shallows warm first, fish move up to stage and spawn, with sheltered, sun-warmed water coming on earliest.

Summer. Once the surface heats, fish slide toward deeper edges, shade, and main-body structure, and low light fishes best.

Fall. Cooler water brings forage and bass shallow again; fish range widely as they feed up.

Winter. Largemouth go deep and sluggish in cold water, so a slow, methodical approach is the safer bet.

Key structure

  • Points where shallow water drops toward deeper water
  • Hard-bottom and rock transitions
  • Inside turns where a bank changes angle
  • Channel edges and the breaks beside them

Read the season; the structure list only matters through that lens.

Forage

Where the bait goes on Horsetooth Reservoir, the largemouth follow — that is the read here.

Access

Access is public around Horsetooth Reservoir; ramp and launch status changes with water levels, so confirm locally first.

Regulations

Check current state and local regulations before fishing; limits and seasons can change.

§ 05Sources & field guides

Field guides

Data & references

  • Today's conditions — Open-Meteo, refreshed every ~15 min
  • Moon phase — local astronomical calculation, no external API
  • Lake area, depth, structure — Identity, surface area, coordinates and county/state are from the ProjectD canonical waterbody index (snapshot conus-20260518-v1, group gnis:00177416). Maximum depth and regulation links were not available from an acceptable source and are intentionally omitted.
  • Regulations — verify current state and local regulations before fishing

Last revised · Back to Lake Guide