Rex Reservoir in Delta County: How and When to Fish It

• Overview

  Rex Reservoir is set in Delta County, Colorado. The bank is 10,787 feet above sea level. Small at around 3 acres: two anglers spread out cover most of it. On size it sits at the modest end of our Delta County list. Start from Paonia, 11 miles down the road. The big place round here is Boulder, 145 miles distant. The county line is nowhere near, so one local authority covers the water.

• Where to Fish on Rex Reservoir

  No published figure covers depth, so learn it as you fish. The old creek line under the surface is the feature worth finding. Standing timber shows when the level drops, and fish sit against it. Public occurrence data for Delta County names rainbow trout, white sucker and flannelmouth sucker. County data is a starting point rather than a guarantee. Rex Reservoir gives up its fish to patience rather than distance.

• Seasonal Patterns

  Average temperature peaks around 55°F in July and bottoms out near 17°F in January. Cold winters and warm summers give a wide working range. After mid May the shallows warm and the fish move up. The water is typically free of ice between mid May and mid November. June through September is the settled part of the year, with the shoulders busier for fish. Rex Reservoir fishes to that pattern most years.

• Tackle & Baits

  The rules here are undocumented as far as public sources go. Public data shows nothing built here, so treat the whole approach as informal. Trout here take small spinners, spoons and, where fly water allows, a nymph or dry. Season dates differ by species, so read the table. Close seasons apply to some species and not others. Holy Terror Reservoir, 0.7 miles away, makes the obvious fallback. Ask locally about Rex Reservoir if anything is unclear.