Chronological hatch list for the Brule River and surrounding area.


1. Hendrickson (ephemeralla subvaria) size 12-14




















End of April and becoming more sporadic until the 3rd week of May.
Afternoon emergence, try to be on the water by 1 o’clockish.
Catskill style patterns in more riffled waters and comparaduns and parachutes in flatter slower waters.
An adams can work well.   Size 14 peacock soft hackles can be effective along with pheasant tail nymphs.

note: A couple other mayflies you might see at this time are blue winged olives and slate wing mahogony duns.


2. Sulphers: lt. hendricksons(roturda invaria) and Pale Evening Dun(E.-dorthea and excruclans) size 14-18


















Late may through June.
Late afternoon- early evening emergence.
Comparaduns and parachutes and pheasant tail nymphs(with or w/o bead)


3. Brown Drake( E. Simulans) size 8-12












Usually starts in mid June and lasts a few weeks.
Evening emergence with twilight spinnerfalls.
Comparaduns , extended body, and  spinner patterns needed. Large soft hackles also effective

4. March Browns and Lt. Cahills
June through early july
Late afternoon and evening emergences.
Mostly in faster sections of water.

5. Hex (hexagenia limbata) size 4-8
Generally late evening emergence and after dark spinnerfall.
Starts about the 3rd week of june and lasts a few weeks.
Dun and spinner patterns. wiggle nymphs and emergers can also be effective.
It is possible to encounter daytime hatches.

6. Calibatis size 14-18
afternoon and evening emergence in july on the lake sections of the Brule.

7. Tricos (tricorythodos) size 20-22
Morning emergence until 10 or 11am.
august and into sept.
spinner patterns work the best, but parachutes and comparaduns can work.

8. bwo’s or psuedocloans size 18-24
through out the fall

9. Flying ant hatch size 16-20
August muggy afternoons
black body with cinnamon wings

10. Caddis
Elk hair caddis various colors (tan or olive)
Pupa patterns good too.