Available species include smallmouth bass, walleye, northern pike, catfish, some largemouth bass, and the occasional muskie. The headwaters of the Oswegatchie River above High Falls might be the county's best spot for fishing native brook trout in a remote setting. Accessible by a 13.5 mile canoe trip from Inlet and a portage around High falls, this stretch of river teems with native brookies albeit small ones. Grasse River The Grasse River for the most part, receives light angling pressure. Smallmouth bass, walleyes, and panfish can be found throughout most of the middle and lower stretches of the Grasse.
Some sections hold northern pike and even muskies.
Plumb Brook The Grasse River and Plumb brook rate highly for brown trout. Annual stockings of browns include nearly 700 in the South Branch of the Grasse in the Town of Clare, over 2,000 in the Grasse River in the Town of Russell, and over 4,000 in Plumb Brook in the Town of Russell. From the mouth of the River to the dam at Colton Flow, the Raquette is typical of other small rivers that flow through the county. Access is available at numerous points, fishing pressure is light, and gamefish range from crappies to muskie on the lower sections to trout in the upper regions. The construction of hydroelectric dams on the Raquette River created a series of eight reservoirs called the Upper Impoundments.