Jones Hole National Fish Hatchery
Mountain-Prairie Region
Jones Hole Distribution: (Photos clockwise from top left) Fish stocking truck, Brown trout close-up, View of raceways


The fish distribution plan is cooperatively managed by federal or state biologists and Jones Hole National Fish Hatchery. Approximately 85% of all fish stocked from Jones Hole NFG are released into Colorado River Storage Project (CRSP) waters. The remainder are taken to Uintah and Ouray Indian Reservations, Wind River Indian Reservation, and some State-managed waters.


When the growing fish reach 5 to 10 inches, they are ready for stocking. Fish are transferred from the raceways to a tank truck by means of a motorized pump. A motorized fish pump can load and, through a water displacement process, measure the pounds of trout into the fish hauling trucks from the raceways without using nets. A life-support system using oxygenated and cooled water keeps the trout in good condition for the duration of the trip. The truck driver will take water temperatures and ph measurements upon arrival and temper the tank water until it is approximately the same. This procedure reduces the stress on the fish when they are placed into their new environment. In many instances, the requesting biologist will meet the delivery truck and aid in stocking.


Jones Hole NFH staff currently operate different sized distribution trucks capable of carrying up to 6,000 pounds of fish per trip. These trucks make more than 100 deliveries per year between April and October.