Their open on holidays it looks like!
I was there on Sunday and the river is just fine, no worries there and yes, they'll be open for the 4th.
According to their website, they are open on holidays, and there is no warning that the river is closed - although exercise caution, as most rivers are raging right now. https://cpw.state.co.us/placestogo/parks/EldoradoCanyon
I wish could tell you. I'm back in Georgia. I'm no help
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