There is good fishing in almost all of the many streams for
cut-throat, Eastern brook, Loch Leven, Von Behr, rainbow, and lake
trout and whitefish. The best fishing is, of course, in the streams
farthest from the roads. The best fishing near the roads is in
Yellowstone Lake and River, Firehole River, Madison River, Lamar Creek
and Slough Creek. The fish in Yellowstone Lake are not very game and
the quality is likely to be poor. The fly-fishing is best after August
1, but on the higher portions of some of the streams it is good in
July. Flies and tackle of all kinds can be bought or rented in the
Park. The flies generally used are the following: march brown (early
fishing); black gnat; grizzly king; professor; brown hackle; cow dung,
dark; cow dung, light; gray hackle, yellow body; abbey; coachman;
royal coachman; Parmacheene belle; queen of waters; Jock Scott; silver
doctor; white miller (for late evening).
A fishing license is not required.