Dec. 3, 8:30 a.m. to 10:30 a.m.; Friday, 3 p.m. to 5 p.m., Hilton area of Patapsco Valley State Park, 1100 Hilton Ave., Catonsville. Hikers will cover two to three miles and do yoga poses along the way. All ages may attend, but keep in mind that the trails can be steep and rocky. Meet at the Hilton Nature Center. Call 410-461-5005 to sign up or for more information. Cost: free. Donations welcome.
Dec. 8, 5 p.m. to 9 p.m. at Princeton Sports in Columbia. Five-time Ironman world champion Craig "Crowie" Alexander will host a Q&A session and a signing of his new book, "As The Crow Flies: My Journey to Ironman World Champion."
Dec. 15, Patapsco Valley State Park, Hilton Area. Children 4 and older are welcome to join their parents and other hikers on this easy three-miler through the woods, along the river and across the swinging bridge to Cascade Falls and the Hilton Tire Park. Some small hills and stream crossings. Wear layered clothes and sturdy shoes. Bring water, snacks and lunch. $2 guest fee for non-Mountain Club of Maryland members. Call leader Gerry Hemming at 301-807-4783 to reserve a spot and find out when the hike begins.
Ice skating show
Dec. 16, 4:10 p.m.-5:30 p.m. Join the skaters and coaches of the Learn-to-Skate program as they welcome the holiday season on ice at Piney Orchard Ice Arena, 8781 Piney Orchard Parkway, Odenton. This free event is open to all ages. Information: email@example.com or call 443-756-3128.
Please send your calendar items to firstname.lastname@example.org with "Recreation and Outdoors" in the subject field.