There is always the possibility of something running. There are about 3 rivers/creeks that run fairly often and don't require flash flooding. The guadalupe is dam released and at the right levels has several playholes that are totally sweet. Mexican creek(medina lake spillway) drops 265 ft/mile and when it gets up, runs for 1 or 2 weeks atleast. Then there's a playhole called rio vista that is pretty fun and it always runs. You can check out my website of pics by clicking the www button below. Check out www.paddletexas.com
if you want to know more.