Grimes Brooks Reservoir Fishing in Routt County, Colorado

• Overview

  Look for Grimes Brooks Reservoir in Routt County, Colorado. Everything around it is mixed forest. The water covers some 43 acres, so pick a bank rather than trying to cover it all. Shoreline comes to about 1.3 miles, small enough to learn in a day. Few waters listed in Routt County are bigger. Kremmling lies 23 miles from the water. Boulder is the closest city, 82 miles away. A border sits close enough to be relevant to the paperwork.

• Where to Fish on Grimes Brooks Reservoir

  Our records carry no depth, so judge it from the bank. Standing timber shows when the level drops, and fish sit against it. Points where the flooded channel swings in are the reliable ones. Reported across Routt County: brook trout, cutthroat trout, rainbow trout and mountain whitefish. Species recorded across the county may be limited to a few waters. On Grimes Brooks Reservoir the quiet end is the one worth the extra effort.

• Seasonal Patterns

  Expect July to average close to 61°F, with January the cold end at about 19°F. Winter shuts the surface down for months. Ice is part of the season here, ending near late April. The open-water window runs from around late April to about late November in an average year. Right after break-up, and again as the nights sharpen, is when to go. The season on Grimes Brooks Reservoir rarely departs from it.

• Tackle & Baits

  Who may fish here is not settled in anything we hold. The map shows no ramp or car park nearby, so this is a walk-in water. Trout here take small spinners, spoons and, where fly water allows, a nymph or dry. Read any posted signs at the access point rather than assuming. Signs go up and come down, so check on the day. The nearest alternative is Noble Reservoir, 1.6 miles out. Treat access at Grimes Brooks Reservoir as something to verify.