steve from saint louis on 6/29/2021 9:06:48 AM:
DNR maintains a Trail Advisory Map online. However, in your case, best to follow this link....https://mostateparks.com/page/58843/potential-flood-locations , which shows that the Weldon Springs area begins flooding when the St. Charles Guage is at 31 feet. That page also provides a link to the river level data at the St. Charles Guage, showing a current crest at 29 feet, so it should be open now. However, would not take much more rain to push that above 31 feet.