ISLAND PARK RESERVOIR IS THE CENTER OF THE UNIVERSE WHEN THE QUALITY OF UPPER HENRY S FORK FISHERIES IS CONSIDERED. GIVEN THAT THE HENRY S FORK DOWNSTREAM OF ISLAND PARK RESERVOIR HAS CONSISTENTLY RANKED AS A TOP DESTINATION FOR FLY FISHING ANGLERS, MANY PEOPLE ARE INTERESTED. HFF AIMS TO DEVELOP NEW MECHANISTIC AND PREDICTIVE MODELS OF WATER QUALITY AND FISH HABITAT, WHICH WILL ALLOW FOR FORECASTING OF WATER CONDITIONS AND FISH HABITAT IN ISLAND PARK RESERVOIR GIVEN KNOWN CLIMATIC, HYDROLOGIC, AGRICULTURAL, MANAGEMENT, AND LIMNOLOGICAL CONDITIONS. TRANSITIONING FROM REACTIVE MONITORING PROJECTS TO PROACTIVE PREDICTIVE MODELING ASSISTS IN MANAGING AND UNDERSTANDING MANAGEMENT ALTERNATIVES CONSEQUENCES. MODELS DEVELOPED THROUGH THE PROJECT ILLUSTRATE HOW EFFECTIVE DIFFERENT WATER CONSERVATION AND MANAGEMENT STRATEGIES COULD BE, THEREBY ASSISTING THE HFF IN OPTIMIZING AND PRIORITIZING SMALL-SCALE, ON-FARM PRECISION MANAGEMENT AND WATER-CONSERVATION PROJECTS THAT BENEFIT ISLAND PARK RESERVOIR.