Could it be that the course setter has already started hanging the control markers for this November's upcoming O event?  I can see at least four control markers in the below photograph of Catalina State Park.  Perhaps you can spot them too.

To help you find the four control markers, click on the image to activate the javascript magnifying glass, and then drag the magnifying glass around the image, using the clues below as your guide.  Good luck!

Start

1. Saguaro Cactus

2. Boulder, 1 m

3. Spur, at the foot

4. Large wash, in the bend

Finish

zipzoom

Catalina State Park (Photo Original by Shawn Z. Lea.  Magnifier by www.isdntek.com)