Calvert Alliance Against Substance Abuse sponsors Step by Step, a 5K fun run/walk honoring Mike Blackwell, a marathon runner who was killed in 2001 while jogging. Some proceeds will be donated to the Mutual Elementary School Playground Fund. Run along a 3.1-mile course covering scenic roadways along the river and back bay. Teams and groups welcome. No pets. 9 a.m. Saturday. Calvert Marine Museum, Route 2/4, Solomons. In advance, $20; children 10 and younger, $10; day of race, $25. 410-535-3733.


Get ready to meet the Antrobus family in "The Skin of Our Teeth," a prehistoric spoof of the nuclear family by Thornton Wilder. The optimistic bunch -- consisting of a father who invents the wheel, a mother who invents the apron, a son with the mark of Cain, a daughter who struggles to act ladylike, and a maid named Sabina -- somehow manages to survive fire, flood, pestilence and war all in one play. 8 p.m. Thursdays-Saturdays and 2 p.m. Sundays, Nov. 7-17. Bruce Davis Theater, Montgomery Hall Fine Arts Center, St. Mary's College of Maryland, 18952 E. Fisher Rd, St. Mary's City. $7; children and seniors, $3.50. 240-895-4243 or boxoffice@smcm.edu.

See Thornton Wilder's prehistoric spoof of the nuclear family, the Antrobuses of Excelsior, N.J., in "The Skin of Our Teeth" at St. Mary's College. Performances will be staged Nov. 7-17.