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Triadelphia Reservoir

Triadelphia Reservoir is a reservoir in Maryland, near Montgomery County.

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Triadelphia Reservoir Fishing Weather

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Fish species in Triadelphia Reservoir

Triadelphia is the upstream Patuxent reservoir above Brighton Dam. It offers wooded fishing water close to the Washington-Baltimore area, with several recreation areas around its shoreline. Walleye add an appealing target alongside bass, but checking the ramp status is part of choosing where to begin.

Lake facts

  • Lake size: About 800 acres
  • Fish to target: Largemouth bass, walleye and panfish

Where to fish

Work a soft plastic along cove edges for bass, then compare the nearest point and deeper slope. For walleye, a bottom-oriented jig in lower light is a sensible starting presentation. Keep the drift controlled so you can tell the difference between bottom, wood and a bite rather than dragging blindly through cover.

Getting on the water

Big Branch, Greenbridge and Triadelphia are named access areas. On October 16, 2026, WSSC listed those ramps open but Pigtail closed to trailers because of the water level. Check the live status before towing. A watershed use permit is needed in addition to the applicable fishing license.

A few things to know

WSSC issued a blue-green algae advisory in August 2026. Read its current health notices before boating or fishing and avoid contact with blooms. Shoreline recreation and picnicking remain subject to posted restrictions, including temporary closures for water quality or managed hunts.

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.

  • Black Crappie — supporting source

    Maryland DNR Public Angler Access Map

    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.

  • Bluegill — supporting source

    Maryland DNR Public Angler Access Map

    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.

  • Chain Pickerel — supporting source

    Maryland DNR Public Angler Access Map

    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.

  • Channel Catfish — supporting source

    Maryland DNR Public Angler Access Map

    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.

  • Common Carp — supporting source

    Maryland DNR Public Angler Access Map

    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

    Maryland DNR Public Angler Access Map

    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.

  • Northern Pike — supporting source

    Maryland DNR Public Angler Access Map

    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.

  • Smallmouth Bass — supporting source

    Maryland DNR Public Angler Access Map

    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.

  • Striped Bass — supporting source

    Maryland DNR Public Angler Access Map

    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.

  • Tiger Muskie — supporting source

    Maryland DNR Public Angler Access Map

    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.

  • Walleye — supporting source

    Maryland DNR Public Angler Access Map

    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.

  • White Perch — supporting source

    Maryland DNR Public Angler Access Map

    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.

  • Yellow Perch — supporting source

    Maryland DNR Public Angler Access Map

    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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