Saguaros — the stately sentinels of the desert — only grow in the Sonoran Desert. But as iconic as they are, many of us don’t know much about them. Why do they grow arms? How do you estimate their age? Ranger B. will answer these questions and more during a quarter-mile Super Saguaro Hike along the Desert Hawk Trail.
DETAILS >> 10 a.m. Thursday, Dec. 20. Usery Mountain Regional Park, 3939 N. Usery Pass Road, Mesa. $6 per vehicle. (480) 984-0032 or www.maricopa.gov.