The Madison River flows can vary day to day and season to season. Typically, the Madison River flows are at their highest during the spring runoff when the snow melts and water is rapidly released from Hebgen Dam and Ennis Lake. The length and severity of the spring runoff is determined by the snowpack each year. One thing for certain, fishing during the runoff does not suck. Don't be fooled by this misconception. The lowest flows on the Madison River are experienced in the late summer and dead of winter. Flows under 900 CFS can make for some skinny water, but nonetheless, the Madison River stays floatable year-round.
Upper Madison River Flows near Cameron, MTSource
Upper Madison River Water Temperature near Cameron, MTSource
Lower Madison River Flows below Ennis Lake Near Mcallister, MTSource
Lower Madison River Water Temperature below Ennis LakeSource
More information on the Madison River