Fishing Lac des Grosses Roches in Mauricie, Quebec

• Overview

  In Quebec, Lac des Grosses Roches belongs to Mauricie. The land about it is spruce and muskeg. The water measures roughly 5 hectares, so nothing here is far from anything else. Nearest town is Weymontachie, 54 km off. After that come Saint-Félicien at 76 km and Saint-Prime at 78 km. Within a short drive: Lac des Iles 0.8 km away, 1.9 km away is Lac Dionne, Lac Beaute 2.7 km away, 3.2 km away is Lac Surprise and Lac de la Reserve 3.4 km away. No border sits close enough to matter.

• Where to Fish on Lac des Grosses Roches

  No published figure covers depth, so learn it as you fish. The shallow end warms first and pulls fish in ahead of the rest. This is a lake, so the margins and the first drop matter most. Across Mauricie, recorded fish include northern pike, brook trout and walleye. County records show what lives in the area; the local agency holds the water-by-water list. On Lac des Grosses Roches that means starting tight and working out.

• Seasonal Patterns

  July is the warm end of the year here, averaging about 16°C, while January sits near -18°C. This is a two-season water: locked, then wide open. The lid usually sets by midwinter and gives way around early May. Going by climate averages, expect open water from about early May until roughly mid November. Spring is short and heavy here; autumn is longer and steadier. At Lac des Grosses Roches the season follows that pattern closely.

• Tackle & Baits

  The access position is unclear from public sources. Formal access is not mapped, so the last stretch is likely on foot. A small crankbait along the drop and a worm in the thick stuff cover the bass. Parking space is the usual limit rather than the bank itself. Signs go up and come down, so check on the day. Should this one be busy, Lac des Iles is 0.8 km off. Signs at Lac des Grosses Roches carry more weight than any list.