Custer County · reservoir · 1,178 acres
Mackay Reservoir
Stocked 14× since 2025 · IDFG
Mackay Reservoir is a reservoir in Custer County, Idaho, stocked with Rainbow Trout and Rainbow Trout (Triploid) — most recently on Jun 9, 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°
15 mph
15%
Fri
Overcast
91°
58°
22 mph
3%
Sat
Overcast
93°
63°
21 mph
0%
↗ pressure risingPost-front rising pressure can slow things down for a day.
Stocking ledger
| — 2026 — | ||||
| Jun 9 | Rainbow Trout (Triploid) | 2,075 | 13" | |
| May 22 | Rainbow Trout | 168,042 | 4.5" | |
| May 19 | Rainbow Trout | 4,218 | 13" | |
| May 19 | Rainbow Trout (Triploid) | 2,067 | 13" | |
| May 11 | Rainbow Trout | 4,195 | 6" | |
| May 1 | Rainbow Trout | 1,200 | ||
| Jan 22 | Rainbow Trout | 62 | ||
| Jan 15 | Rainbow Trout | 460 | ||
| Jan 13 | Rainbow Trout | 272 | ||
| — 2025 — | ||||
| Dec 4 | Rainbow Trout | 468 | ||
| Dec 4 | Rainbow Trout | 169 | ||
| Nov 7 | Rainbow Trout (Triploid) | 1,696 | 6" | |
| Nov 7 | Rainbow Trout (Triploid) | 673 | 6" | |
| Nov 7 | Rainbow Trout (Triploid) | 2,690 | 6" | |
When does Mackay Reservoir get stocked?
Going by 14 records since 2025, stocking here peaks in May.
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 rainbow trout → · All Idaho waters with rainbow trout (triploid) →
Nearby waters
- Warm Springs Creek1.5 mi
- Upper Cedar Creek1.5 mi
- Parsons Creek1.5 mi
- Navarre Creek2.5 mi
- Middle Fork Navarre Creek2.8 mi
- Jones Creek4.7 mi
- Swauger Slough6.3 mi
- Lehman Creek5.7 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.
Mackay Reservoir fishing — FAQ
What fish are stocked in Mackay Reservoir?+
Mackay Reservoir is stocked with Rainbow Trout and Rainbow Trout (Triploid) in Custer County, Idaho, most recently on Jun 9, 2026 by IDFG. The full stocking ledger is on this page.
When does Mackay Reservoir get stocked?+
Going by 14 records since 2025, stocking at Mackay Reservoir peaks in May. Check this page for the season's scheduled and most recent stockings.
Do I need a license to fish Mackay 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 Mackay Reservoir?+
Mackay Reservoir is a reservoir in Custer County, Idaho. Driving directions and an interactive topo map are on this page.
Data: IDFG · updated Jun 9, 2026 · checked daily · we publish what agencies publish, nothing else.