What's the longest butterfly race you could swim?

A few years ago I did the 1000 FR as a fly swim at the CO state SCY championship meet. My goal was to break 20 min and I hit about 18. The next year Erica Leetmae swim the 1650 as a fly event. Her fly time was just slightly slower than my freestyle 1650 at the same meet.

A few years ago I did the 1000 FR as a fly swim at the CO state SCY championship meet. My goal was to break 20 min and I hit about 18. The next year Erica Leetmae swim the 1650 as a fly event. Her fly time was just slightly slower than my freestyle 1650 at the same meet.