Fishing at Potholes Reservoir, Washington
28,200-acre reservoir · Grant County · 1,046 ft elevation · 3 species stocked
Stretching across 28,200 acres in Grant County, Potholes Reservoir is a reservoir known to anglers throughout Washington for its consistent fishery for its target species. Whether you're casting from a kayak or running deeper structure from a boat, the data on this page will help you plan your next trip.
Recent Stocking Reports
The most recent 8 stocking events on record for Potholes Reservoir:
| Date | Species | Quantity | Avg size |
|---|---|---|---|
| Mar 5, 2026 | 🌈 Rainbow Trout | 19,425 | 2.9″ |
| Dec 29, 2025 | 🐠 Largemouth Bass | 2,619 | 12.1″ |
| Apr 29, 2025 | 🐠 Largemouth Bass | 2,024 | 4.6″ |
| Mar 2, 2025 | 🐟 Walleye | 519,527 | 9.8″ |
| Nov 13, 2024 | 🌈 Rainbow Trout | 2,035 | 7.6″ |
| Nov 7, 2024 | 🐟 Walleye | 682,141 | 6.9″ |
| Oct 1, 2024 | 🐠 Largemouth Bass | 2,762 | 11.3″ |
| May 28, 2024 | 🐠 Largemouth Bass | 2,996 | 5.8″ |
Species You Can Catch
- 🌈 Rainbow Trout — best in spring, fall
- 🐠 Largemouth Bass — best in spring, summer
- 🐟 Walleye — best in spring, fall
Where to Catch Rainbow Trout in Washington
If you're targeting one of the species stocked in Potholes Reservoir, the state-level guide ranks the top lakes by stocking volume — a good supplement to this page when planning a trip:
- Top Rainbow Trout lakes in Washington
- Top Largemouth Bass lakes in Washington
- Top Walleye lakes in Washington
Best Time to Fish Potholes Reservoir
For rainbow trout, the best fishing on Potholes Reservoir is typically in spring and fall, when surface temperatures fall in the 50–65°F range. That window matches the active feeding period for the species and aligns with reservoir thermal turnover, putting fish in predictable depths and structure. Check the recent stocking dates above — fish are easiest to locate in the first two to four weeks after a planting.
Gear Recommendations
Curated picks for the species stocked in Potholes Reservoir. Links go to Amazon — as an Amazon Associate we earn from qualifying purchases.
- rod: Ultralight 6'6" spinning rod
- reel: Light spinning reel (1000 size)
- rod: Medium-heavy 7' baitcasting rod
- reel: Baitcasting reel 7.1:1
- rod: Medium-light 7' spinning rod (sensitive tip)
- lure: Jig heads 1/8 - 1/4 oz
Nearby Lakes
Other stocked waters within ~75 miles of Potholes Reservoir:
- Moses Lake — 14.0 mi (6,815 ac)
- Banks Lake — 61.5 mi (27,000 ac)
Fishing Regulations
A valid Washington fishing license is required at Potholes Reservoir. Buy one online and check current regulations at the Washington Department of Fish and Wildlife. Always confirm seasonal closures, size limits, and creel limits before fishing.
Frequently Asked Questions
What fish are stocked in Potholes Reservoir?
Potholes Reservoir has been stocked with Rainbow Trout, Largemouth Bass, Walleye.
When was Potholes Reservoir last stocked?
The most recent stocking on record was Mar 5, 2026, when 19,425 rainbow trout were planted.
Do I need a fishing license for Potholes Reservoir?
Yes — a valid Washington fishing license is required. Purchase one online from the Washington Department of Fish and Wildlife.