Breckenridge Backstage Theatre’s “Vanya and Sonya and Masha and Spike” July 29-Aug. 24: Comedy about two step-siblings who have lived their entire lives in their family’s farmhouse. $20-$29. 121 S. Ridge St., Breckenridge; 970-453-0199; backstagetheatre.org. Colorado Shakespeare Festival’s “Henry VI, Part 2” July 31: Original practices performance of Shakespeare’s War of the Roses play.