Ray (webmaster) on 3/16/2011 6:17:42 PM:
I second Trek's comment: Since the DNR manages the trail, their site should always be the most current and authoritative source regarding closures (http://mostateparks.com/park/katy-trail-state-park). We pull the advisories from the DNR site twice a day, so the trail condition information here (near the bottom of the home page) should always be pretty fresh too.
Also, people often post information here in the BikeKatyTrail forum about trail conditions, which may or may not show up in the DNR advisories. This forum is an especially good resource when there is flooding occurring.
It's probably a good idea to check both sources - plus the weather forecast - before you set out on your trip.