Fremont County · reservoir · 7,550 acres
Island Park Reservoir
1 stocking on record · IDFG
Island Park Reservoir is a reservoir in Fremont County, Idaho, stocked with Rainbow Trout — most recently on May 20, 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
84°
50°
11 mph
47%
Fri
Overcast
90°
57°
12 mph
3%
Sat
Overcast
92°
62°
19 mph
0%
↗ pressure risingPost-front rising pressure can slow things down for a day.
Stocking ledger
| — 2026 — | ||||
| May 20 | Rainbow Trout | 18,720 | 13" | |
Angler reports
What's biting
No reports yet — be the first
Best bite times
No reports yet
Field notes
No notes yet
Nearby waters
- Golden Lake3.5 mi
- Icehouse Creek2.8 mi
- Sheridan Creek3.1 mi
- Sheep Creek3.7 mi
- Dry Creek4.4 mi
- Hotel Creek3.9 mi
- Bishop Lake4.2 mi
- West Fork Hotel Creek5.4 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.
Island Park Reservoir fishing — FAQ
What fish are stocked in Island Park Reservoir?+
Island Park Reservoir is stocked with Rainbow Trout in Fremont County, Idaho, most recently on May 20, 2026 by IDFG. The full stocking ledger is on this page.
Do I need a license to fish Island Park 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 Island Park Reservoir?+
Island Park Reservoir is a reservoir in Fremont County, Idaho. Driving directions and an interactive topo map are on this page.
Data: IDFG · updated May 20, 2026 · checked daily · we publish what agencies publish, nothing else.