The Memorial Hermann Ironman Triathalon is causing traffic delays Saturday afternoon. TxDOT says the Ironman race will cause a couple of road closures. F.M. 1488 eastbound and westbound from F.M. 149 to Fish Creek in Montgomery County will be closed periodically from 7am to 6pm, and F.M. 1486 northbound and southbound from F.M. 2819 to Jackson Rd. in Montgomery County will be closed periodically Saturday from 10am to 5pm.