Big Flat Reservoir in Grand County: How and When to Fish It

• Overview

  Out in Grand County, Utah, sits Big Flat Reservoir. The land about it is dry rangeland. It covers about 3 acres, so this is small water you can walk round in under an hour. Moab lies 13 miles from the water. The nearest city of size is Provo, 155 miles away. The county line is nowhere near, so one local authority covers the water.

• Where to Fish on Big Flat Reservoir

  We hold no survey for this water; read the slope of the shoreline instead. The arms fish better than the open middle whenever the water is up. Levels move with the draw rather than the rain on water like this. Public occurrence data for Grand County names green sunfish, channel catfish, rainbow trout and common carp. It is the county picture; the agency list is water-specific. Big Flat Reservoir responds to conditions more than to tactics.

• Seasonal Patterns

  Seasonal averages run from 26°F in January up to 76°F in July. Ice comes and goes from one year to the next. In a normal year the cover is thin and short-lived. November and March are the quiet, comfortable months to be out. It holds true on Big Flat Reservoir more years than not.

• Tackle & Baits

  Access status is simply unknown for this water. Records show it does not hold water year-round. We find no slipway, car park or made path within a short radius, so treat access as rough. Trout here take small spinners, spoons and, where fly water allows, a nymph or dry. Look for a notice board at the entrance. Where the way in crosses private ground, ask first. The nearest alternative is TexasGulf Potash Pond Three A, 6.5 miles out. For Big Flat Reservoir in particular, ask before you travel.