Old Dillon Reservoir in Summit County: How and When to Fish It

• Overview

  You will find Old Dillon Reservoir in Summit County, Colorado. It lies 9,190 feet above sea level. The water measures roughly 8 acres, so nothing here is far from anything else. Silverthorne lies 1.4 miles from the water. After that come Frisco at 2.9 miles and Keystone at 4.5 miles. This one is safely inside the county line. There is no development on most of the bank.

• Where to Fish on Old Dillon Reservoir

  There is no recorded depth, so work from what you can see. Look for where the old bank line still shows under the surface. Standing timber shows when the level drops, and fish sit against it. Public occurrence data for Summit County names brook trout, rainbow trout and brown trout. Protected fish appear in the records for this area, so treat the list as information, not an invitation. Treat Old Dillon Reservoir as a water to read rather than to cover.

• Seasonal Patterns

  The warmest month averages 56°F, the coldest about 17°F. Seasons are distinct, and each one fishes differently. The freeze runs deep into the year, with break-up near early May. The open-water window runs from around early May to about mid November in an average year. Reckon on open water from spring through to late autumn, with May and June the strongest. The season on Old Dillon Reservoir follows the weather closely.

• Tackle & Baits

  The access position is unclear from public sources. The nearest car park we can see is half a mile out, so expect a walk with your gear. Overnight stays are possible about half a mile out, where camping is mapped. There are toilets half a mile off. Light line and small metal for the trout; a fly rod earns its place on calm evenings. Ask in the nearest town if you are unsure. Close seasons apply to some species and not others. For a change of water, Dillon Bay is 0.6 miles distant. Confirm before you fish Old Dillon Reservoir.