Custer County · reservoir · 49 acres
Mosquito Flat Reservoir
Stocked 3× on record · IDFG
Mosquito Flat Reservoir is a reservoir in Custer County, Idaho, stocked with Kokanee (Triploid) and Rainbow Trout (Triploid) — most recently on Jul 7, 2026. FishableWaters aggregates every stocking record for this water from IDFG; the latest schedule and today's bite windows are above.
Best days this week
Days near a new or full moon tend to fish best.
Today's bite windows
Conditions, next 3 days
Today
Overcast
83°
53°
10 mph
18%
Fri
Overcast
86°
60°
23 mph
1%
Sat
Overcast
87°
64°
18 mph
0%
↗ pressure risingPost-front rising pressure can slow things down for a day.
Stocking ledger
| — 2026 — | ||||
| Jul 7 | Rainbow Trout (Triploid) | 1,029 | 6" | |
| Jun 8 | Kokanee (Triploid) | 5,763 | 1.5" | |
| Jun 8 | Rainbow Trout (Triploid) | 1,992 | 13" | |
Angler reports
What's biting
No reports yet — be the first
Best bite times
No reports yet
Field notes
No notes yet
All Idaho waters with kokanee (triploid) → · All Idaho waters with rainbow trout (triploid) →
Nearby waters
- Lodgepole Creek2.0 mi
- Twin Creek4.5 mi
- Twin Creek Lakes4.6 mi
- Slab Barn Lake3.6 mi
- Buster Lake5.5 mi
- Challis Creek Lakes4.5 mi
- Spruce Gulch Lake6.0 mi
- Bear Creek5.1 mi
Seasons, limits, and rules are the state's call — check the official ID regulations and buy your license before you go. We link the source; we never restate the rules.
Mosquito Flat Reservoir fishing — FAQ
What fish are stocked in Mosquito Flat Reservoir?+
Mosquito Flat Reservoir is stocked with Kokanee (Triploid) and Rainbow Trout (Triploid) in Custer County, Idaho, most recently on Jul 7, 2026 by IDFG. The full stocking ledger is on this page.
Do I need a license to fish Mosquito Flat Reservoir?+
Yes — Idaho requires a fishing license. Buy one from the state and check current seasons and limits before you go; both are linked on this page.
Where is Mosquito Flat Reservoir?+
Mosquito Flat Reservoir is a reservoir in Custer County, Idaho. Driving directions and an interactive topo map are on this page.
Data: IDFG · updated Jul 7, 2026 · checked daily · we publish what agencies publish, nothing else.