Grass Flat Reservoir in Sanpete County: How and When to Fish It

• Overview

  Grass Flat Reservoir lies in Sanpete County, Utah. Elevation runs to 8,816 feet. It covers about 3 acres, so this is small water you can walk round in under an hour. It is one of the smaller waters we list in Sanpete County. Ephraim lies 13 miles from the water. Manti is 15 miles away, with Spring City at 16 miles. No boundary runs near, so the county rules hold throughout.

• Where to Fish on Grass Flat Reservoir

  Depth here is unknown, so count the lead down before committing. Levels move with the draw rather than the rain on water like this. Points where the flooded channel swings in are the reliable ones. Across Sanpete County, recorded fish include rainbow trout, brown trout and Atlantic salmon. Protected fish appear in the records for this area, so treat the list as information, not an invitation. Work Grass Flat Reservoir in sections rather than trying to cover it.

• Seasonal Patterns

  Climate normals give 59°F for July and 21°F for January. Four clear seasons, with a proper winter at one end. After early May the shallows warm and the fish move up. The season between ice runs from about early May to mid November. The middle of summer slows a little, with dawn and dusk carrying it. The season on Grass Flat Reservoir rarely departs from it.

• Tackle & Baits

  There is no clear statement anywhere on who can fish it. No made access is recorded, so a short walk in is the likely arrangement. Light line and small metal for the trout; a fly rod earns its place on calm evenings. Rules for this water may differ from the county norm. A polite question at the farm gate opens more banks than anything else. Academy Mill Reservoir, 0.6 miles away, makes the obvious fallback. Signs at Grass Flat Reservoir carry more weight than any list.