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Western USTrout Stream Data Explorer

Electrofishing survey data from Colorado, Idaho, Utah, Washington & Wyoming — brook, brown, rainbow, cutthroat & bull trout — 2018–2019

-- Streams
-- Samples
-- Date Range
-- Data Sources
Linear density metric. These surveys (EPA NRSA) record reach length but not wetted width, so fish-per-area density cannot be calculated. Density is expressed as fish per km of electrofished reach — a relative abundance index comparable within this dataset.

Stream Rankings

# Stream Name 📍 Sp. State Avg Density
fish/km		 Best Site
fish/km		 Peak
fish/km		 Avg Fish
/Sample		 Peak Fish
/Sample		 Samples Years First Last Region Source

Data Sources