Hello how may I help you? Hi. i would like some info about Montreal. what do you want to know? On what river is Montreal located? Montreal river is one do you want to know how long it is? Yes please! its 136.7 miles long anything else? Wow! Are there ever flooding problems in the city? yes it can flood when rains are heavy but it is well designed so the flooding is not too bad Great. Thanks. have a good day