Fishing at O'Brien Lake, Thunder Bay District, Ontario

• Overview

  The Thunder Bay District entry here is O'Brien Lake, in Ontario. The bank gives way to rolling bush. With some 83 hectares of water, there is room for a boat but no need of one. At about 7.0 km of edge, most people work one arm at a time. By elevation it sits in the lower part of our Ontario listings. The closest town, Schreiber, is 29 km distant. Thunder Bay sits 125 km out, and it is the nearest city worth the name. One jurisdiction covers this water end to end.

• Where to Fish on O'Brien Lake

  There is no published depth for this one, so start shallow and work out. Look for the band where the shallows give up and the bottom falls away. Where the bottom changes texture, fish gather; find that line. Records held for Thunder Bay District cover cisco, blackfin cisco, rainbow smelt and bloater. Read it as a county summary, not a water-by-water list. O'Brien Lake gives up its fish to patience rather than distance.

• Seasonal Patterns

  The range across the year is -13°C to 16°C. A solid cap is the normal state through winter. Firm cover through the cold months, then open water from late April. Averages suggest open water from about late April through to roughly late November. The middle of summer slows a little, with dawn and dusk carrying it. On O'Brien Lake that shapes the whole year.

• Tackle & Baits

  No access rule appears in what we hold. No dam controls it, and the level follows the season. Mapping records no facilities at all near this water. Keep the gear simple: light line, small hooks, split shot and a couple of proven lures. Rules for this water may differ from the county norm. Keep proof of licence with you rather than in the car. Hiller Lake sits 0.9 km off and takes the overflow. Ask locally about O'Brien Lake if anything is unclear.