Mount St. Macrina House of Prayer will hold the Fourth Annual Young Adult Retreat, June 22-24, for men and women, ages 18-35. The theme is “Joyfully Adulting: Discerning, Loving, Serving.” Young adults are working with Basilian Sister Barbara Jean to prepare the program, which includes conferences, break-out groups, confessions, prayer services and Divine Liturgy. Retreat begins Friday, 7 p.m., and concludes Sunday, 12 p.m. Offering is $110. Register by June 15: (724) 438-7149.