The hatches begin as soon as the water clears from run-off, generally near the end of June, and will continue through the month of October. The season begins with the most prolific hatch of the season, the Pale Morning Duns. PMD’s are a beautiful mayfly that will range in color from light yellow to pink, orange, and green. Fish will feed vigorously upon these mayflies for about a month. Along with the PMD’s, there are a plethora of stoneflies on the Teton.