MONTANA RESERVOIR REPORT

Last Updated: January 1, 2026

As of the latest observations, Montana's dams and reservoirs are exhibiting varied conditions, with particular attention given to Flathead Lake at Polson, MT. Currently, Flathead Lake's water surface level is measured at 2892 feet above datum, which is slightly above its average of 2889.52 feet. Although this indicates that Flathead Lake is holding more water than usual, it's within a typical variance range for this time of the year. The increased level may be attributed to local weather patterns or upstream water management decisions. It is important to note that reservoir levels can fluctuate based on numerous factors including seasonal precipitation, snowpack melt, and water consumption for agriculture and urban areas.

Diving deeper into specific conditions, we cross-referenced recent news articles to gain further insight into regional water concerns. According to KPAX News' review of 2025, no significant events at Montana's major dams were highlighted as affecting current reservoir conditions. However, the Bozeman Daily Chronicle reported that Rock Creek experienced unusually low flow levels, prompting Fish, Wildlife and Parks (FWP) to consider purchasing water to sustain fish populations. This situation at Rock Creek could be indicative of localized drought conditions affecting certain water bodies in the state. Additionally, while Duluth Country Radio's report focused on Minnesota's weather, it could suggest broader regional climate patterns that have the potential to impact Montana's water systems, such as altered precipitation rates and shifting seasonal temperatures. Given these factors, it is critical for water resource management in Montana to continually monitor not only local conditions but also broader weather trends that could influence river flows and reservoir levels. As it stands, Flathead Lake remains the most notable example with its elevated level, yet with no immediate concerns of abnormal conditions for the time being.

Montana has many reservoirs and dams that provide water for irrigation, hydropower, and recreation. Some notable reservoirs include Fort Peck Lake on the Missouri River, Hungry Horse Reservoir on the Flathead River, and Lake Koocanusa on the Kootenai River. These reservoirs receive water from various streams, rivers, and creeks in the surrounding areas, with snowpack and mountain melt contributing significantly to the water supply. The general hydrology of Montana is influenced by its mountainous terrain, with the western part of the state having a wetter climate and the eastern part being more arid. Record levels have been observed in recent years due to heavy snowfall and precipitation, but the state has also experienced drought conditions in some areas. Seasonal trends show that spring and early summer are the wettest times of the year, while late summer and fall are typically drier. Overall, reservoirs and dams play an important role in managing Montana's water resources and supporting various industries and recreational activities.

Montana has many reservoirs and dams that provide water for irrigation, hydropower, and recreation. Some notable reservoirs include Fort Peck Lake on the Missouri River, Hungry Horse Reservoir on the Flathead River, and Lake Koocanusa on the Kootenai River. These reservoirs receive water from various streams, rivers, and creeks in the surrounding areas, with snowpack and mountain melt contributing significantly to the water supply. The general hydrology of Montana is influenced by its mountainous terrain, with the western part of the state having a wetter climate and the eastern part being more arid. Record levels have been observed in recent years due to heavy snowfall and precipitation, but the state has also experienced drought conditions in some areas. Seasonal trends show that spring and early summer are the wettest times of the year, while late summer and fall are typically drier. Overall, reservoirs and dams play an important role in managing Montana's water resources and supporting various industries and recreational activities.