Fishing at Loukonen Brothers Reservoir, Boulder County, Colorado

• Overview

  Loukonen Brothers Reservoir lies in Boulder County, Colorado. Height above sea level is 5,318 feet. At roughly 9 acres, the whole thing is within casting reach of a single walk. The closest town, Niwot, is 4.8 miles distant. After that come Gunbarrel at 5 miles and Boulder at 5.2 miles. No border sits close enough to matter. It sits away from the main road, which keeps the noise down.

• Where to Fish on Loukonen Brothers Reservoir

  Open data we checked carries no depth for this water. Held water runs deepest at the wall and shallows back to the inflow. The arms fish better than the open middle whenever the water is up. Open biodiversity records for Boulder County list black-spotted cutthroat trout, brook trout, brown trout, bluegill and rainbow trout. County data is a starting point rather than a guarantee. On Loukonen Brothers Reservoir the obvious spot is not always the productive one.

• Seasonal Patterns

  Expect July to average close to 69°F, with January the cold end at about 30°F. The swings are modest, so patterns change slowly. It is not guaranteed even in a cold spell, so check yourself. March through May is the strongest run, with October and November a second stretch. The season on Loukonen Brothers Reservoir rarely departs from it.

• Tackle & Baits

  Public sources are silent on who controls the bank. A parking area is marked roughly half a mile out. Public toilets are recorded roughly half a mile off. Trout here take small spinners, spoons and, where fly water allows, a nymph or dry. A phone call first saves an afternoon. Rules for boats are stricter than rules for the bank in many places. The nearest alternative is Left Hand Valley Reservoir, 0.6 miles out. Treat Loukonen Brothers Reservoir as unsettled until someone local tells you otherwise.