On Dec. 18th, you’ll learn about mistletoe in Arizona and its winged friend while you go on a one-mile hike on the Merkle Trail located at Area 6 at Usery Mountain Regional Park. The walk starts at 10 am. Registration is not required, but there is a $6 per vehicle park entry fee. Closed-toe shoes are required footwear. Don’t forget to bring water! Usery Mountain Regional Park is located at 3939 N. Usery Pass Rd. in Mesa.