Climb the Wall Rock Climbing Classes at the Starsmore Discovery Center, 2120 S. Cheyenne Blvd. Free, 578-6146. Minimum height: 4'6". Daily, 3-4:30 p.m.

Daily Guided Hikes from the Starsmore Discovery Center, 2120 S. Cheyenne Road. Wear hiking boots and bring water. From 11 a.m. to noon: Columbine Trail. From 1:30-3:30 p.m.: Silver Cascade. At 2:30 p.m.: Wildflower Safari.

Ultimate Frisbee Coed Summer League playing Wednesdays at 6 p.m., through Aug. 14 at Fountain Valley School. $30 includes custom team shirt and disc. Beginners welcome, ages 16+. Call Scott, 210-5390.

Night Programs at the Garden of the Gods. Free, 219-0108. On Tuesdays at 7 p.m.: Bat Walks. RSVP to 219-0108, space limited. On Wednesdays: Prairie Falcon Walks.