Fishing at Rock Isle Lake, Improvement District No. 9, Alberta

• Overview

  Set in Improvement District No. 9, Alberta, this is Rock Isle Lake. Elevation runs to 2,245 metres. Surface area runs to about 5 hectares — small enough to read in one session. Head to Banff, 20 km away, for anything you forgot. Calgary sits 119 km out, and it is the nearest city worth the name. Round about: Larix Lake 0.9 km away, 1 km out stands Grizzly Lake, Eohippus Lake 3.5 km away, 3.9 km out stands Howard Douglas Lake and Bourgeau Lake 8.1 km away. There is no boundary nearby to worry about.

• Where to Fish on Rock Isle Lake

  Our records carry no depth, so judge it from the bank. Still water like this holds fish on the edges rather than out in the open. A soft bed grows weed late into autumn, which keeps fish shallow. Improvement District No. 9 records list brook trout, bull trout, cutthroat trout and mountain whitefish among the fish reported. Protected fish appear in the records for this area, so treat the list as information, not an invitation. At Rock Isle Lake the water rewards a slow, careful approach.

• Seasonal Patterns

  Between January at about -13°C and August at about 10°C, the water has a wide range to work through. The year splits cleanly: hard water, then open water. Count on hard cover from midwinter, and open water from mid May. Ice clears near mid May and comes back about early November in a typical year. Spring is short and heavy here; autumn is longer and steadier. Time your trip to Rock Isle Lake by conditions rather than dates.

• Tackle & Baits

  Nothing in our records says who may fish here. Mapping records toilets within 270 m. Trout here take small spinners, spoons and, where fly water allows, a nymph or dry. A landowner's word beats anything printed elsewhere. Signs go up and come down, so check on the day. For a change of water, Larix Lake is 0.9 km distant. Nothing here settles the position at Rock Isle Lake for certain.