When they clean the river
It's great all round. No tickets required.
For what's it's worth, I went in late January and thought it was pretty awesome, lots of people out and about
I would say best time for visit would be depending on the type of weather you enjoy. Fall and Spring would be ideal for that median point far as temperature. You don't need tickets for River walk only the tower activities and restaurant
April-may September- October You can purchase the tickets online.
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