Btw - I rode from Folsom Lake to Old Sac (well Discovery Park) at the end of August, and I rode from Watt to Beal's Pt about a week ago. No problems with the trail. What are you concerned about? It's too early for localized flooding.
I rode from Mile Marker 0 to Beal's Point yesterday (and back) and I ride the trail between Discovery and Watt/Howe as my nightly spin. No problems, issues or other oddities to report. There's some sketchy pavement when you get near the train tracks coming into Old Sac from Discovery. I also noticed a lot of pine needles on the trail when you get to the rollers south of Folsom but other than that it's "a-ok."