Friday – Whether you’ve been to San Tan before or have simply seen the mountains in the distance, you may have wondered: How did those mountains get there? This class will go into the basic geologic history of the park, point out notable features that can be found along the trails and explore how erosive forces may shape the park’s future. After the indoor talk we’ll take a 1-mile geo-hike on Littleleaf and Goldmine Trails and see some of these features firsthand. What to bring: Water, hat, sunscreen. Meet inside the Visitor Center. 1-2:30pm.