The Bigfork Summer Playhouse has been staging professional theatre in this small Montana village since 1960, which makes it one of the longest-running professional summer companies in the Northwest. The productions are full-scale Broadway musicals and comedies, performed by professional actors and musicians recruited from around the country.
The theatre is right in the centre of the village and the season runs from late May through early September, with multiple shows running in repertoire. Quality varies by production, but the overall standard is reliably high for a company this size. Tickets typically sell well in advance for weekend performances — booking ahead is worthwhile if you're planning around a show.
Check the Playhouse website for the current season's schedule and ticket availability. The venue is small enough that there isn't really a bad seat.