Clark Reservoir in Boulder County: How and When to Fish It

• Overview

  Look for Clark Reservoir in Boulder County, Colorado. The bank is 5,148 feet above sea level. The water measures roughly 18 acres, so nothing here is far from anything else. Some 3.9 miles away sits Longmont, the nearest settlement. Boulder is the closest city, 16 miles away. Rules can differ a short way off, since the county line is near.

• Where to Fish on Clark Reservoir

  No depth figure has reached our records, which makes a plummet useful. The arms fish better than the open middle whenever the water is up. Draw-down through summer strips the margins, so follow the water out. Species logged across Boulder County include black-spotted cutthroat trout, brook trout and brown trout. Those are county-wide records, so not every one of them will be in this water. The near bank of Clark Reservoir is often the one people ignore.

• Seasonal Patterns

  The year swings from about 28°F in January to roughly 72°F in July. The freeze here is occasional rather than annual. It is not guaranteed from one year to the next. March through May is the strongest run, with October and November a second stretch. Anyone fishing Clark Reservoir regularly works to that calendar.

• Tackle & Baits

  The access position is unclear from public sources. The nearest mapped parking is half a mile away, so the last stretch is on foot. Light line and small metal for the trout; a fly rod earns its place on calm evenings. Bank access can be seasonal on ground like this. Where tickets apply, they are sold in the nearest town rather than on the bank. If the gate is shut, Longs Peak Reservoir Number 2 at 1.1 miles is the nearest alternative. Rules at Clark Reservoir are worth checking on the day.