I found this hike by looking for trails using Google Earth. It starts very near the Upper Green Mountain traihead, just a quarter mile further up the Catalina highway at the San Pedro Vista lookout. But instead of heading East, this trail heads West up Incinerator Ridge leading eventually up to Mt. Bigelow. The first part of this trail is newer, so it isn’t shown on many maps (at least that I could find). Still, this trail is one of the most beautiful trails I’ve been on around Tucson, partly because it runs along a ridge so you get views in all directions, but also because the rock cliffs here are simply fantastic. Mt. Bigelow itself was a disappointment compared to the earlier sections of this trail.
Because of the recent rains in Tucson, the humidity was higher and so even though the average elevation of the hike is 8000 feet, it still felt quite warm, and I sweated a lot. The hike itself was just 6.2 miles round trip and climbed 1200 feet above the parking lot (or about 1900 feet in total climbing). Here is the Google Earth video of my hike (full GPX file is available here):
And here is the Google Earth elevation profile of the hike:
I found this map displayed at the top of Mt. Bigelow. It doesn’t show the start of the trail I hiked, but it does show the section that runs up Mt. Bigelow:
And here is the iPhone video I made of my hike:
And the panoramic photos I took using my iPhone:
Finally, here is an interesting panel that is displayed at the San Pedro Vista parking lot, regarding the view North towards the San Pedro river valley: