Ranger Nikki leads a fitness hike on a 9.2-mile loop of the San Tan, Malpais and Hedgehog trails. You will pass sandy washes and desert views, and the group stops now and then to talk about the plants and animals. The ground is mostly level but rocky in places, and about 2 miles of Malpais Trail is deep sand, so expect a real workout. Bring closed-toe shoes, snacks and about 3 liters of water. Hiking poles help in the sand. Registration is required and space is limited to 20 hikers. Registration closes Dec. 3. Call the San Tan Nature Center at (602) 506-2930, ext. 7. Park entry is $10 in exact cash, or bring an Annual Pass.