Onion Valley Reservoir was constructed in the early 1960s as an irrigation reservoir. The land surrounding the reservoir is managed by the Bureau of Land Management making the entire area accessible to angling.
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- Region
- Western
- County
- Humboldt
- Type of water
- Lake or Reservoir
Fishing Report
Onion is fishing very well. Good reports have come in from both shore and boat anglers. Spin fisherman using small bright spinners and spoons are finding lots of fish from shore. Fly fisherman stripping small streamers and large nymphs are also doing very well from shore. Some surface activity has been reported early in the day. Sporadic damsels and mayfly hatches are keeping the fish active along the shore most the day.
Onion Valley Reservoir Angler Guide Information
07-01-2024Stocking Updates
| Stocked | Species | Inches | Date Stocked | Year to Date |
|---|---|---|---|---|
| 1155 | Rainbow Trout | 9.3 | 06-11-2024 | 1534 |
| 379 | Rainbow Trout | 9.4 | 06-11-2024 | 379 |
Pertinent Information
Onion Valley Reservoir covers 101 acres when full and has a maximum depth of 24 feet. Sport fish include rainbow trout, bowcutt trout (rainbow x cutthroat trout hybrid), and tiger trout (brown x brook trout hybrid). Anglers generally catch trout ranging from 9 to 16 inches. The best times of year to fish are mid-June during the damselfly hatch and from mid-October to the end of the season (November 15). The standard baits include nightcrawlers and Power Bait along with flies (nymph patterns and woolly buggers) fished from float tubes. Camping occurs at primitive sites and a restroom is located at the south end of the lake. Aspen stringers make this area a beautiful place to camp.