← Lake Guide42.93° N · 111.62° W

Idaho

Blackfoot Reservoir

Tucked into Caribou County, Idaho, Blackfoot Reservoir is a 16,913-acre reservoir where largemouth move with cover, baitfish, and weather.

Surface
16,913acres
Primary species
Largemouth
§ 01Today on the water · Blackfoot Reservoirvia Open-Meteo · 15:00 local
Air temp
70.6°F
Barometric
29.85″
→steady 24h(+0.05)
Wind
5mph
from SSE
Moon
Waxing Crescent
day 4.0 · 17% lit

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

§ 03Next 3 daysvia Open-Meteo · interpretation
  1. 18
    julSat

    Stable window

    hi 91° · lo 59°

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

    ── light n wind · settled

  2. 19
    julSun

    Stable window

    hi 93° · lo 62°

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

    ── light nw wind · settled

  3. 20
    julMon

    Stable window

    hi 96° · lo 62°

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

    ── light nw wind · settled

§ 04Field notesIdaho

Where it is

Blackfoot Reservoir sits in Caribou County, Idaho, covering about 16,913 acres. Season and conditions decide the productive water; the map is the starting point.

Seasonal pattern

Spring. Blackfoot Reservoir sits high in Caribou County, and its 16,913 acres carry winter deep into spring — the largemouth season starts late, gated by cold water off the Idaho high country.

Summer. The compressed summer is the productive core: fish work cover and edges hard while the warmth lasts, and the season rewards showing up in its narrow prime.

Fall. Cooling is abrupt at elevation; a brief autumn window, then the reservoir slides toward winter early.

Winter. Effectively closed for largemouth — long, frozen, and quiet until a late thaw restarts the year.

Key structure

  • Creek and cove mouths that funnel fish and bait
  • Weed edges and the clean lines along them
  • Inside turns where a bank changes angle
  • Submerged wood, brush, and laydown cover

The calendar decides which of these is worth time on a given day.

Forage

Largemouth on Blackfoot Reservoir hunt baitfish and panfish along cover; forage and weather drive the day's bite.

Access

Public access points serve Blackfoot Reservoir; verify ramp conditions and lake levels before setting out.

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:00397452). 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