The underwater world of Montana is as scenic as the rocky mountain peaks surrounding it. Glacier National Park, a vast wilderness preserve that passes into Canada has the largest lake: Lake McDonald. The lake is home to numerous native species of trout as well as other game fish. The lake also home to Lake Superior whitefish, mountain whitefish and kokanee salmon.
Canyon Ferry Lake is a reservoir 50 miles downstream from where the Gallatin, Madison, and Jefferson Rivers join to form the Missouri River. The reservoir hosts 76 miles of shoreline, and offers excellent diving opportunities. Rainbow trout, perch, ling, and walleye take up home here.
The best time for scuba diving in Montana is from June to September, when surface temperatures are warmer and weather conditions are most stable. Water temperatures typically range from 10–20°C depending on depth and season. Drysuits or thick wetsuits are recommended even in summer. Winter diving is possible for experienced divers but involves very cold conditions. Planning around summer ensures the safest and most comfortable Montana diving experience.
It is recommended to wear a full 5/7mm wetsuit during the summer in the lakes. If you dive in the spring or fall, most locals will opt for a dry suit. Ice diving is possible in some of the lakes.
No matter what time of year you visit Montana, excellent visibility and amazing underwater vistas are ready and waiting.
Accessing Montana dive sites typically begins with flights into Bozeman or Kalispell, followed by road travel to lakes and reservoirs. Many freshwater sites are accessible via public shoreline entries or boat ramps. Local dive shops provide air fills, equipment rental, and training courses. With easy access to alpine waters and uncrowded dive sites, diving in Montana offers a relaxed inland diving experience set against dramatic mountain scenery.
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