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 continues to fish well into the summer. Vehicle access has improved greatly from the spring. Bait fisherman using eggs and worms under a bobber or off the bottom in open water are catching good fish. Spin fisherman have been reporting action all day on small rooster tails and panther martins. Fish are averaging 13-14 inches but there’s no shortage of fish in the 16-19 inch range.
Onion Valley Reservoir Angler Guide Information
09-06-2023Pertinent 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.