Cogswell Reservoir near Monrovia: Fishing Spots, Seasons and Access

• Overview

  Out in Los Angeles County, California, sits Cogswell Reservoir. It stands 2,365 feet above sea level. The water covers some 145 acres, so pick a bank rather than trying to cover it all. Head to Monrovia, 6.5 miles away, for anything you forgot. The nearest city of size is Pasadena, an 11 miles drive. No border sits close enough to matter.

• Where to Fish on Cogswell Reservoir

  Depth is unmeasured here, so let the shoreline guide you. Held water runs deepest at the wall and shallows back to the inflow. Built water gives depth close in, which suits a bank angler. Open occurrence data for the surrounding area lists rainbow trout, santa ana sucker, black bullhead, common carp and green sunfish. Check the state or provincial list before planning around one species. Take Cogswell Reservoir a stretch at a time.

• Seasonal Patterns

  Temperature averages peak at 73°F in August and bottom out at 49°F in January. Heat, not cold, shapes the year here. March through May is the strongest run, with autumn a second stretch. The cooler months are the comfortable ones to fish here. Time your trip to Cogswell Reservoir by conditions rather than dates.

• Tackle & Baits

  Ownership and access are not documented in what we hold. There is no recorded infrastructure here; expect to find your own way in. Light line and small metal for the trout; a fly rod earns its place on calm evenings. Parking is often the real limit rather than the bank itself. Barbless rules turn up on managed water more often than not. For a change of water, Morris Reservoir is 7.4 miles distant. Nothing here settles the position at Cogswell Reservoir for certain.