General fishing season on Most of Montana’s smaller rivers and streams in the western and central fishing districts closes Nov. 30. In the eastern fishing district, the season on rivers and streams extends year round. Fishing is also open year round on all of the state’s lakes and reservoirs. Emergency regulations are sometimes in effect to protect a fishery, for example when low water flows combined with winter freezing present a threat. Signs are posted on waters with emergency fishing regulations in effect. To check in advance for emergency regulations call 406-444-2449 or go to the FWP website under Fishing, click on Regulations and then on Emergency Fishing Closures. Emergency regulations in effect at this time are: Closed :