Lost River Outfitters is a family-style fly shop and outdoor outfitter based in Ketchum, Idaho, in the Sun Valley resort area. The company draws on 50 years of guiding experience to help visitors explore the region’s rivers, lakes, and surrounding landscapes. Its professional guides offer fly-fishing trips on waters including the Big Lost, Silver Creek, Big Wood, Little Wood, and Salmon rivers, as well as Yellowstone-area lakes and reservoirs.

Beyond fishing, the outfitter provides hunting and preserve hunts, hiking, kids’ camps, steelhead and Yellowstone trips, and winter fly-fishing adventures. The Ketchum shop stocks fishing gear, clothing, and accessories, and sells fishing licenses. Customers can also find local fishing reports, trip rates, packing lists, and advice from shop staff to prepare for excursions.

Lost River Outfitters hosts events such as fly-tying gatherings and operates under special use permits for public lands and Yellowstone National Park. The company is licensed, bonded, and insured, and identifies as an equal opportunity employer