The Santa Catalina Mountains form the northern limit to Tucson's northern edge. The front range contains many trails for recreational hiking, and provide easy access to native desert in just a few minutes of hiking. The trail to Window Rock climbs about 4500 feet elevation and is over 12 miles round trip. Much easier to spot it visually or in binoculars! The picture shown here at left was taken a couple miles from our house this morning, at the intersection of Campbell and Water, just north of Grant. From the Chase Bank parking lot on the SW corner, the highest peaks of the front range are shown. Not visible in the thumbnail shown, click on it to load the full-size image. The Window is towards the right side near the top of the mountain profile - a large clear natural hole through the cliff allowing the sky to come through. I've never done the hike, though Googling "Window Rock Tucson" brings up many hike descriptions and close-up pictures of it. If you don't pick it out of the profile picture at left, the right image is labeled so that you can more easily pick it out. These pictures are a 3-frame panorama with my 70-200mm zoom set to 115mm, and also are HDR images to get details of the storefronts in shadows as well as in the sun lit mountains.
So there you have it! Next time you have a good view to the north of Tucson, and you are south of Ft Lowell and somewhere between I'10 and Swan, scan the north edge of the Santa Catalinas and see if you can spot it. Earlier in the morning is better, but give it a shot!