The Habitat Quality Index (HQI) Procedures Manual is a step-by-step guide to the HQI method, which is used to evaluate trout habitat in Rocky Mountain streams. Purpose of the manual is to provide guidance and standards for conducting HQI evaluations. Subjects discussed included preliminary planning, station selection and layout, equipment, data sources, habitat measurements and HQI calculations. The manual promotes familiarity with the HQI by explaining how and what to measure, as well as proper techniuqes and any useful shortcuts. Text instruction are augmented by photos and line drawings. Several examples and case studies illustrate HQI evaluation procedures.