Gibson Reservoir fishing: Rainbow Trout, Cutthroat Trout, Brook Trout
Target species: Rainbow Trout, Cutthroat Trout, Brook Trout
Boat: 1 ramp or launch on file for this water.
Start here: Launch at Gibson Boat Launch.
The reservoir
Gibson Reservoir covers 1,193 acres in Montana, across 2 counties: Lewis and Clark and Teton. It is a reservoir: 90.4% of it is 130 feet deep or less; the deepest point measured is at least 165 feet (50.3 m). Our records hold 3 species for this water.
Depth and bottom
Deepest measured point: at least 165 ft (50.3 m). That is the deepest contour line: the bottom goes deeper. 90.4% of the water is 130 feet or shallower. We hold 83 depth contour lines for this water.

- 0–10 ft: 1.6% of the water
- 10–20 ft: 4.9% of the water
- 20–30 ft: 6.7% of the water
- 30–40 ft: 8.1% of the water
- 40–50 ft: 11.3% of the water
- 50–60 ft: 9% of the water
- 60–70 ft: 6.8% of the water
- 70–80 ft: 5.3% of the water
- 80–90 ft: 5.2% of the water
- 90–100 ft: 5.9% of the water
- 100–110 ft: 8.5% of the water
- 110–120 ft: 10.6% of the water
- 120–130 ft: 6.5% of the water
- 130–140 ft: 4.1% of the water
- 140–150 ft: 4.8% of the water
- 150–160 ft: 0.9% of the water
3 target fish, led by Rainbow Trout
- Rainbow Trout — Feeding water: 50–65°F.
- Cutthroat Trout — Feeding water: 50–65°F.
- Brook Trout — Feeding water: 50–65°F.
Stocking: 451,770 fish, 1935–1954
Montana Fish, Wildlife & Parks records list 451,770 fish released into this water from 1935 to 1954. The latest stocking on record is from 1954, more than three years ago.
- Rainbow Trout: 321,970 in 1936–1954
- Cutthroat Trout: 84,800 in 1947–1949
- Brook Trout: 35,000 in 1943–1947
One more species on the stocking list.

1 ramp or launch on this water
On this water we hold 1 boat ramp.
- Gibson Boat Launch — US Forest Service. website fs.usda.gov/recarea/hlcnf/recarea/?recid=61690
The place listed has no fee or opening hours on file: a blank means we hold no such field, not that it is free or always open, and this list may not be complete.
What is hard here
Only 1 public ramp is on file, so the launch decides where you fish.
Where this data comes from
- Montana Fish, Wildlife & Parks — Montana Fish, Wildlife & Parks: depth contours: class A, a survey of the bottom.
- USGS RESSED — USGS RESSED reservoir sedimentation database: class B, a depth figure measured and published by an agency, without a bottom map.
- U.S. Bureau of Reclamation (RISE) — USBR area-capacity tables (RISE): class B, a depth figure measured and published by an agency, without a bottom map.
- Webster, K.E., McCullough, I.M., Soranno, P.A. LAGOS-US DEPTH v1.0, EDI, doi:10.6073/pasta/64ddc4d04661d9aef4bd702dc5d8984f (CC BY 4.0); Cheruvelil et al. LAGOS-US LOCUS v1.0 (EDI) — LAGOS-US DEPTH v1.0: Lake depth for 17,675 lakes in the conterminous U.S.: class B, a depth figure measured and published by an agency, without a bottom map.
















