Saturday, March 7, 2026

Tom's Thumb - McDowell Mountains

Tom's Thumb is a prominent 140-foot tall Proterozoic granite monolith, formed roughly 1.4 billion years ago. Located in Scottsdale, Arizona, this quartz-monzonite intrusion stands out due to differential erosion, showcasing jagged, blocky terrain that contrasts with the smoother surrounding metamorphic rocks.

I started my hike at the Gateway Trailhead at 8:10 AM.  From there it was 2.6 miles to the junction of Windgate Pass. That took me 57 minutes. At that point I was beginning Tom's Thumb Trail. Then it was 3 miles to Tom's Thumb. I reached the base of Tom's Thumb at 10:45 AM. It had taken me 2 hours 34 minutes from the Gateway Trailhead, and that was 5.6 miles. Then I hiked about a half mile to the East End Trail. After hiking the East End Trail for 1.5 miles I arrived at the Bell Pass Junction at 12:04 PM. When I got to Bell Pass I took a break to rest my very tired feet. That was 1.4 miles from the last trail junction. It had taken me 48 minutes. Then I was hiking the final 3.4 miles back to my van. It was 2:23 PM when I returned to the Gateway Trailhead. My loop hike was 12.5 miles, and it took me 6 hours and 11 minutes.

















 

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