How big is the water flow in late May?

In general late may and early June will be peak flow depending on the rainfall combined with rate of snowmelt.

I was there 2 weeks ago and it seemed pretty big to me. I've only been there once though.

Have to agree with the answers. Probably good flow for a few more weeks.

I visited around the 5th this year and although spectacular I understand there was greater waterfowl throughout the month of April

Average