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Grassy Mountain Reservoir

Grassy Mountain Reservoir is a reservoir in Oregon, near Malheur County.

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Grassy Mountain Reservoir Fishing Weather

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Fish species in Grassy Mountain Reservoir

Grassy Mountain Reservoir is a reservoir in Malheur County, Oregon.

No reliable acreage is listed for Grassy Mountain Reservoir, so begin with visible cover and the first clear change in depth.

Fish and Baits

Fish listed for Grassy Mountain Reservoir include Bluegill, Brown Bullhead, Largemouth Bass, Redside Shiner, and Rainbow Trout.

During a methodical search near scattered wood where food is present, use a small jig, worm, or tiny plastic around green weeds and protected pockets for bluegill.

During a bright afternoon near a channel bend before changing areas, work a soft plastic, jig, or spinnerbait around weeds and protected cover for largemouth bass.

During a return to the best bank near the downwind side while the water is falling, use a worm on the bottom in a warm, quiet pocket during low light for brown bullhead.

During a bright afternoon near the outside weed line under flat light, cast a small spoon, inline spinner, light jig, or fly through cool water for rainbow trout.

How to Read the Water

During the final pass near a quiet corner in clear water, do not let the deepest number control the whole day; nearby cover, firm bottom, and food usually matter more than the deepest hole by itself.

Season by Season

During the first pass near a protected point while the water is rising, shallow water is worth a careful look in spring and again during fall; bright summer days favor shade, weeds, or deeper breaks; under ice, a small depth change can be more useful than a long move.

A Simple Tackle Plan

During the last hour of daylight near a rocky edge while the water is falling, a light spinning rod, thin line, a few small spoons, inline spinners, and jigs cover the listed trout; carry one slightly heavier setup when other fish or windy water call for more control.

During a short evening pass near a small drop before changing depth, record the wind, water color, depth along the best drop, and cover after a bite; those four notes are more useful on the next trip than a long list of spots that did not produce.

Check the evidence

Sources and what they establish

Source dates describe the evidence, not a live catch forecast. Check the managing authority before planning access or keeping fish.

  • Bluegill — supporting source

    Oregon Department of Fish and Wildlife Fish Habitat Distribution

    The linked source supports this fish’s presence or stocking in this water.

    Source checked:

    This is not a record catch or a measure of how many fish are there today. The source may describe an earlier period.

  • Brown Bullhead — supporting source

    Oregon Department of Fish and Wildlife Fish Habitat Distribution

    The linked source supports this fish’s presence or stocking in this water.

    Source checked:

    This is not a record catch or a measure of how many fish are there today. The source may describe an earlier period.

  • Largemouth Bass — supporting source

    Oregon Department of Fish and Wildlife Fish Habitat Distribution

    The linked source supports this fish’s presence or stocking in this water.

    Source checked:

    This is not a record catch or a measure of how many fish are there today. The source may describe an earlier period.

  • Steelhead — supporting source

    Oregon Department of Fish and Wildlife Fish Habitat Distribution

    The linked source supports this fish’s presence or stocking in this water.

    Source checked:

    This is not a record catch or a measure of how many fish are there today. The source may describe an earlier period.

  • Redside Shiner — supporting source

    Oregon Department of Fish and Wildlife Fish Habitat Distribution

    The linked source supports this fish’s presence or stocking in this water.

    Source checked:

    This is not a record catch or a measure of how many fish are there today. The source may describe an earlier period.

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