Thompson Valley Reservoir

Thompson Valley Reservoir, located in south-central Oregon, functions as a mid-sized irrigation impoundment providing valuable coldwater and coolwater angling. Meticulously managed by the Oregon Department of Fish and Wildlife (ODFW), this high-desert reservoir is preeminently recognized for its consistent rainbow trout fishery, complemented by incidental warmwater opportunities.

The best time to fish Thompson Valley Reservoir is generally in the cooler months of spring and fall, immediately following stocking events, when trout are most active. Summer fishing can be productive, particularly in deeper water, but surface temperatures can get warm, potentially stressing trout. Perch and catfish fishing can be productive throughout the warmer months. Access to Thompson Valley Reservoir is generally good, often via unimproved gravel roads. There is usually at least one unimproved boat launch, and ample parking area, allowing for launching of various types of watercraft. There are also numerous areas for bank fishing around the reservoir's perimeter, though access can be impacted by fluctuating water levels. As an irrigation reservoir, water levels can vary significantly throughout the year, especially during late summer and fall as water is drawn down for agricultural use. This can sometimes affect boat launching and shoreline access, and anglers should always check current conditions.

The primary piscatorial objective is its robust rainbow trout population, rigorously stocked in spring and fall, ensuring reliable angler engagement. Populations of brown bullhead catfish and yellow perch also contribute to its diversified appeal. Angling techniques are straightforward yet effective: trout respond to static baits (PowerBait, worms), dynamic spin-casting with spinners or spoons, or effective boat trolling. Catfish prefer bottom-fished natural offerings. Optimal trout fishing occurs in spring and fall; warmwater species excel throughout warmer months. Access is generally good via unimproved boat launches and bank access, though water levels fluctuate significantly. Anglers are unequivocally mandated to consult the latest ODFW regulations, ensuring absolute adherence to species-specific bag limits and gear restrictions for this secluded, productive high desert fishery.