Elmore County · reservoir · 2,288 acres
Arrowrock Reservoir
Stocked 2× on record · IDFG
Arrowrock Reservoir is a reservoir in Elmore County, Idaho, stocked with Kokanee and Rainbow Trout (Triploid) — most recently on May 21, 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
104°
74°
12 mph
0%
Sat
Overcast
101°
78°
13 mph
0%
Sun
Overcast
90°
60°
17 mph
0%
→ pressure steadyStable weather — expect a normal bite.
Stocking ledger
| — 2026 — | ||||
| May 21 | Kokanee | 201,217 | 4.5" | |
| Mar 16 | Rainbow Trout (Triploid) | 9,086 | 6" | |
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 → · All Idaho waters with rainbow trout (triploid) →
Nearby waters
- South Fork Boise River1.1 mistocked Jul 15, 2026
- Cottonwood Creek1.4 mi
- Cow Creek1.9 mi
- North Fork Cottonwood Creek3.8 mi
- Wood Creek4.4 mi
- Deadman Creek5.2 mi
- Willow Creek5.1 mi
- Flat Creek5.3 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.
Arrowrock Reservoir fishing — FAQ
What fish are stocked in Arrowrock Reservoir?+
Arrowrock Reservoir is stocked with Kokanee and Rainbow Trout (Triploid) in Elmore County, Idaho, most recently on May 21, 2026 by IDFG. The full stocking ledger is on this page.
Do I need a license to fish Arrowrock 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 Arrowrock Reservoir?+
Arrowrock Reservoir is a reservoir in Elmore County, Idaho. Driving directions and an interactive topo map are on this page.
Data: IDFG · updated May 21, 2026 · checked daily · we publish what agencies publish, nothing else.