Grehan Lake Fishing Guide, Thunder Bay District, Ontario

• Overview

  Grehan Lake is set in Thunder Bay District, Ontario. What surrounds it is northern bush. Surface area runs to roughly 2.37 sq km, so plan for one area rather than the whole. The outline measures near 16 km, so local knowledge counts. It ranks high for size among our Thunder Bay District listings. Nearest town is Longlac, 33 km off. Geraldton follows at 35 km, then Greenstone at 48 km. No boundary runs near, so the local rules hold throughout.

• Where to Fish on Grehan Lake

  No depth figure has reached our records, which makes a plummet useful. Bays and points beat straight shoreline every time on water like this. On a natural lake the weed line and the shelf beyond it do the work. Across Thunder Bay District, recorded fish include cisco, blackfin cisco and rainbow smelt. The county figures include rivers and lakes alike. The near bank of Grehan Lake is often the one people ignore.

• Seasonal Patterns

  July is the warm end of the year here, averaging about 16°C, while January sits near -18°C. The window is narrow, and fish feed hard while it lasts. The freeze runs deep into the year, with break-up near early May. Open water usually runs from early May until about mid November. May into June fishes hardest, and September gives a second good stretch before the lid returns. On Grehan Lake the same rules apply, with local timing.

• Tackle & Baits

  Our records carry no access rule either way. No dam controls it, and the level follows the season. Nothing formal is recorded here: no ramp, no car park, no marked path. Keep the gear simple: light line, small hooks, split shot and a couple of proven lures. Parking space is the usual limit rather than the bank itself. Where tickets apply, they are sold in the nearest town rather than on the bank. The nearest alternative is Ragged Lake, 3.4 km out. The position on Grehan Lake is worth confirming on the day.