Yellowstone Park 9-21-10

Some higher country frosts are beginning to nip terrestrial insects, but good populations of these exist on most streams.  This includes Fall River Basin streams, Slough and Soda Butte creeks, and the Lamar River in the meadows. Fishing on the Firehole River is picking up with hatching tricos, BWOs, mahogany duns, midges, and caddisflies providing action.  The big event for this time of year is migrating browns in the Madison, Gibbon, and Lewis rivers.  Low light conditions will be best for encountering these great fish, and streamer patterns are the flies to use.  Particular patterns are not as important as having some in light and some in dark colors.  For some reason, yellow or chartreuse colors in these flies seem to entice strikes.  Looking for still water action in the Park?    Beula Lake remains the best place to find it with a few gulpers still working, and damselfly nymph patterns sure to bring responses.   Best fishing on Lewis and Shoshone lakes this time of year is for migrating browns around their outlets and Lewis Lake’s inlet.