Usually held in June. This is one of Montana's signature events. Next year's dates aren't posted yet; this page shows the last one.
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The Lewis and Clark Festival is held each June at the Lewis and Clark National Historic Trail Interpretive Center above the Missouri River in Great Falls. Costumed reenactors, live demonstrations, vendors and kids activities bring the Corps of Discovery era to life. The 36th festival ran June 19 and 20, 2026, starting Friday evening and continuing all day Saturday.
Listed from Official site
