O'Brien Lake Fishing Guide, Lanark County, Ontario

• Overview

  Out in Lanark County, Ontario, sits O'Brien Lake. The country here is rolling bush. At about 48 hectares, a day is enough to walk the shoreline properly. Around 6.9 km of bank, which is a long day on foot. It lies lower than most water we list in Ontario. The town to know is Sharbot Lake, 17 km out. It is 60 km to Kingston, the nearest city. Two sets of local rules meet not far from this water.

• Where to Fish on O'Brien Lake

  We hold no survey for this water; read the slope of the shoreline instead. The productive water is a rod length or two out, not a hundred. This is a lake, so the margins and the first drop matter most. Survey and observation records for Lanark County include pumpkinseed, rock bass, smallmouth bass and bluegill. At least one recorded species is protected in parts of its range; read the local rules before targeting anything. The shape of O'Brien Lake decides where the fish sit.

• Seasonal Patterns

  On the long-term average, July reads 20°C and January reads -10°C. A full turn of seasons, with the strongest sport on either side of summer. The lid arrives early and lasts until roughly mid April. Average temperatures cross freezing around mid April in spring and again near early December in autumn. Early summer and early autumn carry the open-water season. The season on O'Brien Lake follows the weather closely.

• Tackle & Baits

  Ownership and access are not documented in what we hold. This is a natural basin, not a dammed one. You will be walking about 890 m from the nearest car park. A campsite is mapped about 930 m away, which makes an early start easier. Facilities include toilets around 1.1 km from here. Rules for this water may differ from the county norm. Where parking is tight, arriving early solves most problems. Farren Lake sits 2.8 km off and takes the overflow. Ask locally about O'Brien Lake if anything is unclear.