Utah Fishing

Big Flat Reservoir

Nestled in the west of Utah, Big Flat Reservoir offers anglers spectacular Lake fishing for Rainbow Trout. Big Flat Reservoir is located near western Utah at coordinates 38.52, -109.79. The spectacular lake provides stable water levels and diverse habitat for Rainbow Trout, Largemouth Bass, Kokanee Salmon. Local anglers frequently report success with Rainbow Trout, Largemouth Bass, Kokanee Salmon at Big Flat Reservoir.

Lake Utah 38.5200, -109.7900
Updated 2026-04-29

Location

View on Google Maps 38.5200, -109.7900

Target Species

Rainbow TroutRainbow TroutLargemouth BassLargemouth BassKokanee SalmonKokanee Salmon

Fishing Tips

  • Focus on shoreline drop-offs during early morning when Rainbow Trout are active.
  • Focus on dam faces during dawn when Rainbow Trout are active.
  • Focus on shoreline drop-offs during sunset hours when Rainbow Trout are active.

Fishing Techniques for Big Flat Reservoir

Local forage and water conditions dictate the best approach. Clear water calls for natural colors and lighter line; stained water favors chartreuse, white, and vibrating baits. Pay attention to water temperature — it drives fish positioning more than any other factor at this lake.

What to Expect at Big Flat Reservoir

This lake offers a scenic Utah setting with water clarity that varies by season and recent weather. Amenities range from improved parking and facilities at some access points to more primitive launch areas. Check conditions before heading out, especially after heavy rain.

Regulations

Utah fishing license required. Verify regulations with Utah Division of Wildlife Resources before fishing.

Fishing Tips for Big Flat Reservoir

Antelope Valley Number Three Reservoir

Blue Flat Reservoir

Crescent Wash Reservoir

Frequently Asked Questions

Check local tourism information or contact Utah Division of Wildlife Resources for details on facilities and parking.

Fish sizes vary seasonally. Local fishing reports provide current catch information.